$ git clone -n https://src.fedoraproject.org/rpms/ocaml-lwt.git /var/lib/mock/f41-build-side-1-2943364-35356/root/chroot_tmpdir/scmroot/ocaml-lwt
Cloning into '/var/lib/mock/f41-build-side-1-2943364-35356/root/chroot_tmpdir/scmroot/ocaml-lwt'...
$ git fetch origin f292a9fed005aca0a965b31ae404239e796aa644:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-lwt
 * [new ref]         f292a9fed005aca0a965b31ae404239e796aa644 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f292a9f Rebuild for ocaml-ppxlib 0.33.0