$ git clone -n https://src.fedoraproject.org/rpms/ocaml-menhir.git /var/lib/mock/f40-build-739750-109242/root/chroot_tmpdir/scmroot/ocaml-menhir
Cloning into '/var/lib/mock/f40-build-739750-109242/root/chroot_tmpdir/scmroot/ocaml-menhir'...
$ git fetch origin 6fb9427e8f590fc3cbff1348f9541bec73dbdddd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-menhir
 * [new ref]         6fb9427e8f590fc3cbff1348f9541bec73dbdddd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fb9427 OCaml 5.1 rebuild for Fedora 40