$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-sexp-conv.git /var/lib/mock/f42-build-872329-177964/root/chroot_tmpdir/scmroot/ocaml-ppx-sexp-conv
Cloning into '/var/lib/mock/f42-build-872329-177964/root/chroot_tmpdir/scmroot/ocaml-ppx-sexp-conv'...
$ git fetch origin 58eb06cceea256f3cecb6fae0ee435b6fafb9c76:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-sexp-conv
 * [new ref]         58eb06cceea256f3cecb6fae0ee435b6fafb9c76 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 58eb06c Rebuild for ocaml-ppxlib 0.35.0