$ git clone -n https://src.fedoraproject.org/rpms/ocaml-base64.git /var/lib/mock/f31-build-72058-30800/root/chroot_tmpdir/scmroot/ocaml-base64
Cloning into '/var/lib/mock/f31-build-72058-30800/root/chroot_tmpdir/scmroot/ocaml-base64'...
$ git reset --hard 789a518eecbb50f430aad62a9bfd8a9dd617dd44
HEAD is now at 789a518 OCaml 4.08.1 (rc2) rebuild.