$ git clone -n https://src.fedoraproject.org/rpms/koko.git /var/lib/mock/f39-build-1661728-40665/root/chroot_tmpdir/scmroot/koko
Cloning into '/var/lib/mock/f39-build-1661728-40665/root/chroot_tmpdir/scmroot/koko'...
$ git fetch origin 0586eec868de19b8887b543a3786388d0fc1e9bd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/koko
 * [new ref]         0586eec868de19b8887b543a3786388d0fc1e9bd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0586eec 23.08.2