$ git clone -n https://src.fedoraproject.org/rpms/vlc.git /var/lib/mock/f45-build-38119-720/root/chroot_tmpdir/scmroot/vlc
Cloning into '/var/lib/mock/f45-build-38119-720/root/chroot_tmpdir/scmroot/vlc'...
$ git fetch origin 71ac01f5bc0efa8c24127ac18939d1639803ea23:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vlc
 * [new ref]         71ac01f5bc0efa8c24127ac18939d1639803ea23 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71ac01f Rebuilt for libxml-2.15.4