$ git clone -n https://src.fedoraproject.org/rpms/f29-backgrounds.git /var/lib/mock/f41-build-1683021-24255/root/chroot_tmpdir/scmroot/f29-backgrounds
Cloning into '/var/lib/mock/f41-build-1683021-24255/root/chroot_tmpdir/scmroot/f29-backgrounds'...
$ git fetch origin c52d2017435dfc3d8c7b7098dc184ce0bfbd2ba5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/f29-backgrounds
 * [new ref]         c52d2017435dfc3d8c7b7098dc184ce0bfbd2ba5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c52d201 Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild