$ git clone -n https://src.fedoraproject.org/rpms/ocaml-zarith.git /var/lib/mock/f40-build-2050318-49023/root/chroot_tmpdir/scmroot/ocaml-zarith
Cloning into '/var/lib/mock/f40-build-2050318-49023/root/chroot_tmpdir/scmroot/ocaml-zarith'...
$ git fetch origin 843641e051695e391e8df17dcaf90cca0e8b343f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-zarith
 * [new ref]         843641e051695e391e8df17dcaf90cca0e8b343f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 843641e OCaml 5.1.1 rebuild for Fedora 40