$ git clone -n https://src.fedoraproject.org/rpms/prunerepo.git /var/lib/mock/f38-build-side-42-init-devel-897777-28570/root/chroot_tmpdir/scmroot/prunerepo
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-897777-28570/root/chroot_tmpdir/scmroot/prunerepo'...
$ git fetch origin d92d230fbeea3e00837d36f3605de2ddfb35cc97:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/prunerepo
 * [new ref]         d92d230fbeea3e00837d36f3605de2ddfb35cc97 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d92d230 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild