$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-sexp-conv.git /var/lib/mock/f41-build-side-1-2943388-35356/root/chroot_tmpdir/scmroot/ocaml-ppx-sexp-conv
Cloning into '/var/lib/mock/f41-build-side-1-2943388-35356/root/chroot_tmpdir/scmroot/ocaml-ppx-sexp-conv'...
$ git fetch origin 1c2d10c50be20d7fa0f6eba9a9c5f9889749a627:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-sexp-conv
 * [new ref]         1c2d10c50be20d7fa0f6eba9a9c5f9889749a627 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c2d10c Rebuild for ocaml-ppxlib 0.33.0