CherryPickCommand: fix unclosed resource warning

Change-Id: I2dc76efd16d887048a5cb4af2b2d8e6faa4f22cd
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/api/CherryPickCommand.java

@@ -142,13 +142,15 @@ public class CherryPickCommand extends GitCommand<CherryPickResult> {
 					dco.setProgressMonitor(monitor);
 					dco.checkout();
 					if (!noCommit) {
-						newHead = new Git(getRepository()).commit()
+						try (Git git = new Git(getRepository())) {
+							newHead = git.commit()
 									.setMessage(srcCommit.getFullMessage())
 									.setReflogComment(reflogPrefix + " " //$NON-NLS-1$
 											+ srcCommit.getShortMessage())
 									.setAuthor(srcCommit.getAuthorIdent())
 									.setNoVerify(true).call();
 						}
+					}
 					cherryPickedRefs.add(src);
 				} else {
 					if (merger.failed()) {