public class CloneRepoIntoTmpAndInspectHEAD {
	public static void main(String args[]) throws IOException, GitAPIException, JGitInternalException {
		Path tmp = Files.createTempDirectory("JGitTest_" + CloneRepoIntoTmpAndInspectHEAD.class.getName());
		try (Git git = Git.cloneRepository().setDirectory(tmp.toFile()).setURI(args[0]).setBare(false).call()) {
			System.out.println("Repo " + args[0] + " cloned to " + tmp);
			Repository repo = git.getRepository();
			ObjectId lastCommitId = repo.resolve(Constants.HEAD);
			try (RevWalk walk = new RevWalk(repo)) {
				RevCommit commit = walk.parseCommit(lastCommitId);
				System.out.println("Commit " + lastCommitId + " has message " + commit.getShortMessage());
			}
		} finally {
			Files.walk(tmp).map(Path::toFile).sorted((o1, o2) -> -o1.compareTo(o2)).forEach(File::delete);
		}
	}
}