$ git clone -n https://src.fedoraproject.org/rpms/ocaml-base64.git /var/lib/mock/f40-build-784632-133494/root/chroot_tmpdir/scmroot/ocaml-base64
Cloning into '/var/lib/mock/f40-build-784632-133494/root/chroot_tmpdir/scmroot/ocaml-base64'...
$ git fetch origin f07a70cea6e34af60b83e7f72693dd223990f36e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-base64
 * [new ref]         f07a70cea6e34af60b83e7f72693dd223990f36e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f07a70c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild