diff --git a/org.eclipse.jgit.http.server/META-INF/MANIFEST.MF b/org.eclipse.jgit.http.server/META-INF/MANIFEST.MF
index f9a66b90a..c85e49646 100644
--- a/org.eclipse.jgit.http.server/META-INF/MANIFEST.MF
+++ b/org.eclipse.jgit.http.server/META-INF/MANIFEST.MF
@@ -21,6 +21,7 @@ Import-Package: javax.servlet;version="[2.5.0,3.2.0)",
  org.eclipse.jgit.errors;version="[5.2.0,5.3.0)",
  org.eclipse.jgit.internal.storage.dfs;version="[5.2.0,5.3.0)",
  org.eclipse.jgit.internal.storage.file;version="[5.2.0,5.3.0)",
+ org.eclipse.jgit.internal.transport.parser;version="[5.2.0,5.3.0)",
  org.eclipse.jgit.lib;version="[5.2.0,5.3.0)",
  org.eclipse.jgit.nls;version="[5.2.0,5.3.0)",
  org.eclipse.jgit.revwalk;version="[5.2.0,5.3.0)",
diff --git a/org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/GitSmartHttpTools.java b/org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/GitSmartHttpTools.java
index b9ca12bf3..ee4b32efb 100644
--- a/org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/GitSmartHttpTools.java
+++ b/org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/GitSmartHttpTools.java
@@ -63,6 +63,7 @@ import java.util.List;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import org.eclipse.jgit.internal.transport.parser.FirstWant;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.transport.PacketLineIn;
 import org.eclipse.jgit.transport.PacketLineOut;
@@ -246,9 +247,9 @@ public class GitSmartHttpTools {
 			// not have an UploadPack, or it might not have read any of the request.
 			// So, cheat and read the first line.
 			String line = new PacketLineIn(req.getInputStream()).readString();
-			UploadPack.FirstLine parsed = new UploadPack.FirstLine(line);
-			return (parsed.getOptions().contains(OPTION_SIDE_BAND)
-					|| parsed.getOptions().contains(OPTION_SIDE_BAND_64K));
+			FirstWant parsed = FirstWant.fromLine(line);
+			return (parsed.getCapabilities().contains(OPTION_SIDE_BAND)
+					|| parsed.getCapabilities().contains(OPTION_SIDE_BAND_64K));
 		} catch (IOException e) {
 			// Probably the connection is closed and a subsequent write will fail, but
 			// try it just in case.
diff --git a/org.eclipse.jgit.test/META-INF/MANIFEST.MF b/org.eclipse.jgit.test/META-INF/MANIFEST.MF
index 2f828a4f3..6df9e3909 100644
--- a/org.eclipse.jgit.test/META-INF/MANIFEST.MF
+++ b/org.eclipse.jgit.test/META-INF/MANIFEST.MF
@@ -32,6 +32,7 @@ Import-Package: com.googlecode.javaewah;version="[1.1.6,2.0.0)",
  org.eclipse.jgit.internal.storage.pack;version="[5.2.0,5.3.0)",
  org.eclipse.jgit.internal.storage.reftable;version="[5.2.0,5.3.0)",
  org.eclipse.jgit.internal.storage.reftree;version="[5.2.0,5.3.0)",
+ org.eclipse.jgit.internal.transport.parser;version="[5.2.0,5.3.0)",
  org.eclipse.jgit.junit;version="[5.2.0,5.3.0)",
  org.eclipse.jgit.lfs;version="[5.2.0,5.3.0)",
  org.eclipse.jgit.lib;version="[5.2.0,5.3.0)",
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/transport/parser/FirstWantTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/transport/parser/FirstWantTest.java
new file mode 100644
index 000000000..572ec8bae
--- /dev/null
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/transport/parser/FirstWantTest.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2018, Google LLC.
+ * and other copyright owners as documented in the project's IP log.
+ *
+ * This program and the accompanying materials are made available
+ * under the terms of the Eclipse Distribution License v1.0 which
+ * accompanies this distribution, is reproduced below, and is
+ * available at http://www.eclipse.org/org/documents/edl-v10.php
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials provided
+ *   with the distribution.
+ *
+ * - Neither the name of the Eclipse Foundation, Inc. nor the
+ *   names of its contributors may be used to endorse or promote
+ *   products derived from this software without specific prior
+ *   written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package org.eclipse.jgit.internal.transport.parser;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.junit.Test;
+
+public class FirstWantTest {
+
+	@Test
+	public void testFirstWantWithOptions() {
+		String line = "want b9d4d1eb2f93058814480eae9e1b67550f46ee38 "
+				+ "no-progress include-tag ofs-delta agent=JGit/unknown";
+
+		FirstWant r = FirstWant.fromLine(line);
+		assertEquals("want b9d4d1eb2f93058814480eae9e1b67550f46ee38",
+				r.getLine());
+		Set<String> capabilities = r.getCapabilities();
+		Set<String> expectedCapabilities = new HashSet<>(
+				Arrays.asList("no-progress", "include-tag", "ofs-delta",
+						"agent=JGit/unknown"));
+		assertEquals(expectedCapabilities, capabilities);
+	}
+
+	@Test
+	public void testFirstWantWithoutOptions() {
+		String line = "want b9d4d1eb2f93058814480eae9e1b67550f46ee38";
+
+		FirstWant r = FirstWant.fromLine(line);
+		assertEquals("want b9d4d1eb2f93058814480eae9e1b67550f46ee38",
+				r.getLine());
+		assertTrue(r.getCapabilities().isEmpty());
+	}
+}
diff --git a/org.eclipse.jgit/META-INF/MANIFEST.MF b/org.eclipse.jgit/META-INF/MANIFEST.MF
index 34bcdb95f..2b9ed0845 100644
--- a/org.eclipse.jgit/META-INF/MANIFEST.MF
+++ b/org.eclipse.jgit/META-INF/MANIFEST.MF
@@ -80,6 +80,7 @@ Export-Package: org.eclipse.jgit.annotations;version="5.2.0",
  org.eclipse.jgit.internal.storage.reftable;version="5.2.0";
   x-friends:="org.eclipse.jgit.http.test,org.eclipse.jgit.junit,org.eclipse.jgit.test,org.eclipse.jgit.pgm",
  org.eclipse.jgit.internal.storage.reftree;version="5.2.0";x-friends:="org.eclipse.jgit.junit,org.eclipse.jgit.test,org.eclipse.jgit.pgm",
+ org.eclipse.jgit.internal.transport.parser;version="5.2.0",
  org.eclipse.jgit.lib;version="5.2.0";
   uses:="org.eclipse.jgit.revwalk,
    org.eclipse.jgit.treewalk.filter,
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/transport/parser/FirstWant.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/transport/parser/FirstWant.java
new file mode 100644
index 000000000..ea0fbed1d
--- /dev/null
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/transport/parser/FirstWant.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2018, Google LLC.
+ * and other copyright owners as documented in the project's IP log.
+ *
+ * This program and the accompanying materials are made available
+ * under the terms of the Eclipse Distribution License v1.0 which
+ * accompanies this distribution, is reproduced below, and is
+ * available at http://www.eclipse.org/org/documents/edl-v10.php
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials provided
+ *   with the distribution.
+ *
+ * - Neither the name of the Eclipse Foundation, Inc. nor the
+ *   names of its contributors may be used to endorse or promote
+ *   products derived from this software without specific prior
+ *   written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package org.eclipse.jgit.internal.transport.parser;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * In the pack negotiation phase (protocol v0/v1), the client sends a list of
+ * wants. The first "want" line is special, as it (can) have a list of
+ * capabilities appended.
+ *
+ * E.g. "want oid cap1 cap2 cap3"
+ *
+ * Do not confuse this line with the first one in the reference advertisement,
+ * which is sent by the server, looks like
+ * "b8f7c471373b8583ced0025cfad8c9916c484b76 HEAD\0 cap1 cap2 cap3" and is
+ * parsed by the BasePackConnection.readAdvertisedRefs method.
+ *
+ * This class parses the input want line and holds the results: the actual want
+ * line and the capabilities.
+ *
+ * @since 5.2
+ */
+public class FirstWant {
+	private final String line;
+
+	private final Set<String> capabilities;
+
+	/**
+	 * Parse the first want line in the protocol v0/v1 pack negotiation.
+	 *
+	 * @param line
+	 *            line from the client.
+	 * @return an instance of FirstWant
+	 */
+	public static FirstWant fromLine(String line) {
+		String wantLine;
+		Set<String> capabilities;
+
+		if (line.length() > 45) {
+			final HashSet<String> opts = new HashSet<>();
+			String opt = line.substring(45);
+			if (opt.startsWith(" ")) { //$NON-NLS-1$
+				opt = opt.substring(1);
+			}
+			for (String c : opt.split(" ")) { //$NON-NLS-1$
+				opts.add(c);
+			}
+			wantLine = line.substring(0, 45);
+			capabilities = Collections.unmodifiableSet(opts);
+		} else {
+			wantLine = line;
+			capabilities = Collections.emptySet();
+		}
+
+		return new FirstWant(wantLine, capabilities);
+	}
+
+	private FirstWant(String line, Set<String> capabilities) {
+		this.line = line;
+		this.capabilities = capabilities;
+	}
+
+	/** @return non-capabilities part of the line. */
+	public String getLine() {
+		return line;
+	}
+
+	/** @return capabilities parsed from the line as an immutable set. */
+	public Set<String> getCapabilities() {
+		return capabilities;
+	}
+}
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java
index 213bfe504..8d2158d56 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java
@@ -86,6 +86,7 @@ import org.eclipse.jgit.errors.MissingObjectException;
 import org.eclipse.jgit.errors.PackProtocolException;
 import org.eclipse.jgit.internal.JGitText;
 import org.eclipse.jgit.internal.storage.pack.PackWriter;
+import org.eclipse.jgit.internal.transport.parser.FirstWant;
 import org.eclipse.jgit.lib.BitmapIndex;
 import org.eclipse.jgit.lib.BitmapIndex.BitmapBuilder;
 import org.eclipse.jgit.lib.Constants;
@@ -177,41 +178,32 @@ public class UploadPack {
 				throws PackProtocolException, IOException;
 	}
 
-	/** Data in the first line of a request, the line itself plus options. */
+	/**
+	 * Data in the first line of a want-list, the line itself plus options.
+	 *
+	 * @deprecated Use {@link FirstWant} instead
+	 */
+	@Deprecated
 	public static class FirstLine {
-		private final String line;
-		private final Set<String> options;
+
+		private final FirstWant firstWant;
 
 		/**
-		 * Parse the first line of a receive-pack request.
-		 *
 		 * @param line
 		 *            line from the client.
 		 */
 		public FirstLine(String line) {
-			if (line.length() > 45) {
-				final HashSet<String> opts = new HashSet<>();
-				String opt = line.substring(45);
-				if (opt.startsWith(" ")) //$NON-NLS-1$
-					opt = opt.substring(1);
-				for (String c : opt.split(" ")) //$NON-NLS-1$
-					opts.add(c);
-				this.line = line.substring(0, 45);
-				this.options = Collections.unmodifiableSet(opts);
-			} else {
-				this.line = line;
-				this.options = Collections.emptySet();
-			}
+			firstWant = FirstWant.fromLine(line);
 		}
 
 		/** @return non-capabilities part of the line. */
 		public String getLine() {
-			return line;
+			return firstWant.getLine();
 		}
 
-		/** @return options parsed from the line. */
-		public Set<String> getOptions() {
-			return options;
+		/** @return capabilities parsed from the line. */
+		public Set<String> getCapabilities() {
+			return firstWant.getCapabilities();
 		}
 	}
 
@@ -1391,8 +1383,8 @@ public class UploadPack {
 
 			if (isFirst) {
 				if (line.length() > 45) {
-					FirstLine firstLine = new FirstLine(line);
-					options = firstLine.getOptions();
+					FirstWant firstLine = FirstWant.fromLine(line);
+					options = firstLine.getCapabilities();
 					line = firstLine.getLine();
 				} else
 					options = Collections.emptySet();