$ git clone -n https://src.fedoraproject.org/rpms/ocaml-sexplib.git /var/lib/mock/f42-build-865658-173376/root/chroot_tmpdir/scmroot/ocaml-sexplib
Cloning into '/var/lib/mock/f42-build-865658-173376/root/chroot_tmpdir/scmroot/ocaml-sexplib'...
$ git fetch origin 98885ee189692871f8a07852c906b6fcfea4a249:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-sexplib
 * [new ref]         98885ee189692871f8a07852c906b6fcfea4a249 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 98885ee OCaml 5.3.0 rebuild for Fedora 42