$ git clone -n https://src.fedoraproject.org/rpms/ocaml-lwt.git /var/lib/mock/f38-build-side-42-init-devel-785501-27964/root/chroot_tmpdir/scmroot/ocaml-lwt
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-785501-27964/root/chroot_tmpdir/scmroot/ocaml-lwt'...
$ git fetch origin 27b9888a0e2addc052da1c8aa0ede79437dc1a02:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-lwt
 * [new ref]         27b9888a0e2addc052da1c8aa0ede79437dc1a02 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27b9888 Rebuild OCaml packages for F38