$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-sexp-conv.git /var/lib/mock/f40-build-739710-109214/root/chroot_tmpdir/scmroot/ocaml-ppx-sexp-conv
Cloning into '/var/lib/mock/f40-build-739710-109214/root/chroot_tmpdir/scmroot/ocaml-ppx-sexp-conv'...
$ git fetch origin d377cb8190427a5485eaad29950c21700e959919:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-sexp-conv
 * [new ref]         d377cb8190427a5485eaad29950c21700e959919 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d377cb8 OCaml 5.1 rebuild for Fedora 40