$ git clone -n https://src.fedoraproject.org/rpms/git-archive-all.git /var/lib/mock/f45-build-11061-426/root/chroot_tmpdir/scmroot/git-archive-all
Cloning into '/var/lib/mock/f45-build-11061-426/root/chroot_tmpdir/scmroot/git-archive-all'...
$ git fetch origin 60bb7ccdaf45319e5d5dd7872c56852280bec6df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/git-archive-all
 * [new ref]         60bb7ccdaf45319e5d5dd7872c56852280bec6df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 60bb7cc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild