$ git clone -n https://src.fedoraproject.org/rpms/ocaml-uucd.git /var/lib/mock/f40-build-2229027-53117/root/chroot_tmpdir/scmroot/ocaml-uucd
Cloning into '/var/lib/mock/f40-build-2229027-53117/root/chroot_tmpdir/scmroot/ocaml-uucd'...
$ git fetch origin 0686b2e5b49e5a80af89a560da9c2472d833ec63:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-uucd
 * [new ref]         0686b2e5b49e5a80af89a560da9c2472d833ec63 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0686b2e OCaml 5.1.1 + s390x code gen fix for Fedora 40