$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-sexp-conv.git /var/lib/mock/f42-build-865797-173520/root/chroot_tmpdir/scmroot/ocaml-ppx-sexp-conv
Cloning into '/var/lib/mock/f42-build-865797-173520/root/chroot_tmpdir/scmroot/ocaml-ppx-sexp-conv'...
$ git fetch origin 7cbc136987775a3560e2a2c36c52448f4878d6ba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-sexp-conv
 * [new ref]         7cbc136987775a3560e2a2c36c52448f4878d6ba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7cbc136 OCaml 5.3.0 rebuild for Fedora 42