$ git clone -n https://src.fedoraproject.org/rpms/gron.git /var/lib/mock/f38-build-side-42-init-devel-589913-26120/root/chroot_tmpdir/scmroot/gron
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-589913-26120/root/chroot_tmpdir/scmroot/gron'...
$ git fetch origin 5fa28265a2316c4cadb7e143d96904be1d455505:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gron
 * [new ref]         5fa28265a2316c4cadb7e143d96904be1d455505 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5fa2826 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild