$ git clone -n https://src.fedoraproject.org/rpms/f31-backgrounds.git /var/lib/mock/f41-build-1683032-24255/root/chroot_tmpdir/scmroot/f31-backgrounds
Cloning into '/var/lib/mock/f41-build-1683032-24255/root/chroot_tmpdir/scmroot/f31-backgrounds'...
$ git fetch origin 006e4be6f64de78910298ed771964a9fe8ce9241:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/f31-backgrounds
 * [new ref]         006e4be6f64de78910298ed771964a9fe8ce9241 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 006e4be Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild