$ git clone -n https://src.fedoraproject.org/rpms/fedorainfinity-backgrounds.git /var/lib/mock/f45-build-8885-396/root/chroot_tmpdir/scmroot/fedorainfinity-backgrounds
Cloning into '/var/lib/mock/f45-build-8885-396/root/chroot_tmpdir/scmroot/fedorainfinity-backgrounds'...
$ git fetch origin 0e54ccaec93718f107d99abb550e8d80217c5d1e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fedorainfinity-backgrounds
 * [new ref]         0e54ccaec93718f107d99abb550e8d80217c5d1e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0e54cca Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild