$ git clone -n https://src.fedoraproject.org/rpms/xine-lib.git /var/lib/mock/f40-build-774058-127571/root/chroot_tmpdir/scmroot/xine-lib
Cloning into '/var/lib/mock/f40-build-774058-127571/root/chroot_tmpdir/scmroot/xine-lib'...
$ git fetch origin b22f497ee350ee35ee66e94c7493bfd976f30f96:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xine-lib
 * [new ref]         b22f497ee350ee35ee66e94c7493bfd976f30f96 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b22f497 Rebuild for dav1d 1.3.0