$ git clone -n https://src.fedoraproject.org/rpms/R-ragg.git /var/lib/mock/f45-build-6355-348/root/chroot_tmpdir/scmroot/R-ragg
Cloning into '/var/lib/mock/f45-build-6355-348/root/chroot_tmpdir/scmroot/R-ragg'...
$ git fetch origin cf4a4afb609ee98ea546f68f2ff37176a9e0f861:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-ragg
 * [new ref]         cf4a4afb609ee98ea546f68f2ff37176a9e0f861 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf4a4af Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild