$ git clone -n https://src.fedoraproject.org/rpms/ocaml-expat.git /var/lib/mock/f40-build-2126863-50780/root/chroot_tmpdir/scmroot/ocaml-expat
Cloning into '/var/lib/mock/f40-build-2126863-50780/root/chroot_tmpdir/scmroot/ocaml-expat'...
$ git fetch origin b4da14fd7f8fdee97905cab84320ae34a4a32fd1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-expat
 * [new ref]         b4da14fd7f8fdee97905cab84320ae34a4a32fd1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4da14f OCaml 5.1.1 + s390x code gen fix for Fedora 40