$ git clone -n https://src.fedoraproject.org/rpms/ocaml-dune.git /var/lib/mock/f41-build-810964-147015/root/chroot_tmpdir/scmroot/ocaml-dune
Cloning into '/var/lib/mock/f41-build-810964-147015/root/chroot_tmpdir/scmroot/ocaml-dune'...
$ git fetch origin cb1ce5ff91978c9e3e8cbd24a1d3f013d337ac86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-dune
 * [new ref]         cb1ce5ff91978c9e3e8cbd24a1d3f013d337ac86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cb1ce5f OCaml 5.2.0 for Fedora 41