$ git clone -n https://src.fedoraproject.org/rpms/mbox-importer.git /var/lib/mock/f39-build-1966913-43295/root/chroot_tmpdir/scmroot/mbox-importer
Cloning into '/var/lib/mock/f39-build-1966913-43295/root/chroot_tmpdir/scmroot/mbox-importer'...
$ git fetch origin 4e36b5da802ca1edde0f937e9e6ad70c2768dea5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mbox-importer
 * [new ref]         4e36b5da802ca1edde0f937e9e6ad70c2768dea5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e36b5d 23.08.3