$ git clone -n https://src.fedoraproject.org/rpms/ocaml-srpm-macros.git /var/lib/mock/f40-build-2201453-51830/root/chroot_tmpdir/scmroot/ocaml-srpm-macros
Cloning into '/var/lib/mock/f40-build-2201453-51830/root/chroot_tmpdir/scmroot/ocaml-srpm-macros'...
$ git fetch origin c4baa36d2fcae7aab928b5631c691afe63d8f46f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-srpm-macros
 * [new ref]         c4baa36d2fcae7aab928b5631c691afe63d8f46f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4baa36 Update OCaml native arches for OCaml 5.1