$ git clone -n https://src.fedoraproject.org/rpms/f26-backgrounds.git /var/lib/mock/f41-build-1683012-24255/root/chroot_tmpdir/scmroot/f26-backgrounds
Cloning into '/var/lib/mock/f41-build-1683012-24255/root/chroot_tmpdir/scmroot/f26-backgrounds'...
$ git fetch origin 159fb7227c85be9c2eeae572650b9ba897599d03:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/f26-backgrounds
 * [new ref]         159fb7227c85be9c2eeae572650b9ba897599d03 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 159fb72 Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild