$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-let.git /var/lib/mock/f41-build-837059-158974/root/chroot_tmpdir/scmroot/ocaml-ppx-let
Cloning into '/var/lib/mock/f41-build-837059-158974/root/chroot_tmpdir/scmroot/ocaml-ppx-let'...
$ git fetch origin 9b30cfbcd6d1aae8694f5e235758f125e257ca8a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-let
 * [new ref]         9b30cfbcd6d1aae8694f5e235758f125e257ca8a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b30cfb Rebuild for ocaml-ppxlib 0.33.0