$ git clone -n https://src.fedoraproject.org/rpms/mbox-importer.git /var/lib/mock/f38-build-714156-94844/root/chroot_tmpdir/scmroot/mbox-importer
Cloning into '/var/lib/mock/f38-build-714156-94844/root/chroot_tmpdir/scmroot/mbox-importer'...
$ git fetch origin 6de845cffc5d957a9e048cdd028b845266bc3827:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mbox-importer
 * [new ref]         6de845cffc5d957a9e048cdd028b845266bc3827 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6de845c 23.04.0