$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-let.git /var/lib/mock/f38-build-side-42-init-devel-707686-27193/root/chroot_tmpdir/scmroot/ocaml-ppx-let
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-707686-27193/root/chroot_tmpdir/scmroot/ocaml-ppx-let'...
$ git fetch origin 1db74c7899455280443bcfe26652efcadcd225b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-let
 * [new ref]         1db74c7899455280443bcfe26652efcadcd225b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1db74c7 Rebuild OCaml packages for F38