$ git clone -n https://src.fedoraproject.org/rpms/ocaml-expat.git /var/lib/mock/f31-build-47009-26762/root/chroot_tmpdir/scmroot/ocaml-expat
Cloning into '/var/lib/mock/f31-build-47009-26762/root/chroot_tmpdir/scmroot/ocaml-expat'...
$ git reset --hard bd54af5be6afe6e27601d10f7a16d7638b90a106
HEAD is now at bd54af5 OCaml 4.08.0 (final) rebuild.