$ git clone -n https://src.fedoraproject.org/rpms/ocaml-yaml.git /var/lib/mock/f40-build-768464-125342/root/chroot_tmpdir/scmroot/ocaml-yaml
Cloning into '/var/lib/mock/f40-build-768464-125342/root/chroot_tmpdir/scmroot/ocaml-yaml'...
$ git fetch origin bb7348c8b9a77e5c7537dfc9d9adcf23908374a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-yaml
 * [new ref]         bb7348c8b9a77e5c7537dfc9d9adcf23908374a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb7348c OCaml 5.1.1 + s390x code gen fix for Fedora 40