import java.io.IOException;
import java.net.URISyntaxException;
import java.text.MessageFormat;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
import org.eclipse.jgit.dircache.DirCache;
import org.eclipse.jgit.dircache.DirCacheCheckout;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.Ref;
-import org.eclipse.jgit.lib.RefComparator;
import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.lib.TextProgressMonitor;
import org.eclipse.jgit.revwalk.RevCommit;