$ git clone -n https://src.fedoraproject.org/rpms/vlc.git /var/lib/mock/f42-bootstrap-3534190-46467/root/chroot_tmpdir/scmroot/vlc
Cloning into '/var/lib/mock/f42-bootstrap-3534190-46467/root/chroot_tmpdir/scmroot/vlc'...
$ git fetch origin a51435bc989372fd48e74e1097ea39a79ecfeb8b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vlc
 * [new ref]         a51435bc989372fd48e74e1097ea39a79ecfeb8b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a51435b vlc-plugin-ffmpeg Requires: vlc-plugins-video-out