$ git clone -n https://src.fedoraproject.org/rpms/f27-backgrounds.git /var/lib/mock/f41-build-1683011-24255/root/chroot_tmpdir/scmroot/f27-backgrounds
Cloning into '/var/lib/mock/f41-build-1683011-24255/root/chroot_tmpdir/scmroot/f27-backgrounds'...
$ git fetch origin 86409125e714f847cb2f4b5fec4bbf767cb82936:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/f27-backgrounds
 * [new ref]         86409125e714f847cb2f4b5fec4bbf767cb82936 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8640912 Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild