$ git clone -n https://src.fedoraproject.org/rpms/f36-backgrounds.git /var/lib/mock/f41-build-side-1-3002890-36598/root/chroot_tmpdir/scmroot/f36-backgrounds
Cloning into '/var/lib/mock/f41-build-side-1-3002890-36598/root/chroot_tmpdir/scmroot/f36-backgrounds'...
$ git fetch origin bfa66ef4f3ea72b8d83c82c337ab033a1357cb6e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/f36-backgrounds
 * [new ref]         bfa66ef4f3ea72b8d83c82c337ab033a1357cb6e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bfa66ef Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild