$ git clone -n https://src.fedoraproject.org/rpms/ocaml-base64.git /var/lib/mock/f41-build-811956-147631/root/chroot_tmpdir/scmroot/ocaml-base64
Cloning into '/var/lib/mock/f41-build-811956-147631/root/chroot_tmpdir/scmroot/ocaml-base64'...
$ git fetch origin e10e9457d31e6c2144ec3f23d54d13c175be7490:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-base64
 * [new ref]         e10e9457d31e6c2144ec3f23d54d13c175be7490 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e10e945 OCaml 5.2.0 for Fedora 41