$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ocplib-simplex.git /var/lib/mock/f31-build-48580-27162/root/chroot_tmpdir/scmroot/ocaml-ocplib-simplex
Cloning into '/var/lib/mock/f31-build-48580-27162/root/chroot_tmpdir/scmroot/ocaml-ocplib-simplex'...
$ git reset --hard f71a6c63ab4866fe32646618c8acd3851e6f7df0
HEAD is now at f71a6c6 OCaml 4.08.0 (final) rebuild.