$ git clone -n https://src.fedoraproject.org/rpms/obs-service-tar_scm.git /var/lib/mock/f40-build-2299802-56665/root/chroot_tmpdir/scmroot/obs-service-tar_scm
Cloning into '/var/lib/mock/f40-build-2299802-56665/root/chroot_tmpdir/scmroot/obs-service-tar_scm'...
$ git fetch origin 7a0efa97e21269534ddc229ce4995cbdbbc93546:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/obs-service-tar_scm
 * [new ref]         7a0efa97e21269534ddc229ce4995cbdbbc93546 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a0efa9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild