$ git clone -n https://src.fedoraproject.org/rpms/vlc.git /var/lib/mock/f41-build-side-1-2882598-34493/root/chroot_tmpdir/scmroot/vlc
Cloning into '/var/lib/mock/f41-build-side-1-2882598-34493/root/chroot_tmpdir/scmroot/vlc'...
$ git fetch origin 2676457f7a1ea6d4e954ac2eb3806d84a5b5f8e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vlc
 * [new ref]         2676457f7a1ea6d4e954ac2eb3806d84a5b5f8e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2676457 Rebuild for live555 update