$ git clone -n https://src.fedoraproject.org/rpms/R-modelr.git /var/lib/mock/f38-build-side-42-init-devel-950173-28779/root/chroot_tmpdir/scmroot/R-modelr
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-950173-28779/root/chroot_tmpdir/scmroot/R-modelr'...
$ git fetch origin 8949bf69ebbb103b3ece3987b93ff52a3712a6ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-modelr
 * [new ref]         8949bf69ebbb103b3ece3987b93ff52a3712a6ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8949bf6 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild