$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-deriving-yojson.git /var/lib/mock/f33-build-190304-46332/root/chroot_tmpdir/scmroot/ocaml-ppx-deriving-yojson
Cloning into '/var/lib/mock/f33-build-190304-46332/root/chroot_tmpdir/scmroot/ocaml-ppx-deriving-yojson'...
$ git reset --hard b5cef0a32f5fd7017f03b1b1da9b14a799e3d297
HEAD is now at b5cef0a Fix for OCaml 4.11, sent upstream today: https://github.com/ocaml-ppx/ppx_deriving_yojson/issues/116