$ git clone -n https://src.fedoraproject.org/rpms/ocaml-base64.git /var/lib/mock/f40-build-739794-109290/root/chroot_tmpdir/scmroot/ocaml-base64
Cloning into '/var/lib/mock/f40-build-739794-109290/root/chroot_tmpdir/scmroot/ocaml-base64'...
$ git fetch origin 095456849f8f358834365d7853830b69e279b9e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-base64
 * [new ref]         095456849f8f358834365d7853830b69e279b9e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0954568 OCaml 5.1 rebuild for Fedora 40