$ git clone -n https://src.fedoraproject.org/rpms/ocaml-logs.git /var/lib/mock/f40-build-783964-133234/root/chroot_tmpdir/scmroot/ocaml-logs
Cloning into '/var/lib/mock/f40-build-783964-133234/root/chroot_tmpdir/scmroot/ocaml-logs'...
$ git fetch origin c15ed5dfac9d7ad406ee1f564d91be1b084054b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-logs
 * [new ref]         c15ed5dfac9d7ad406ee1f564d91be1b084054b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c15ed5d Bump and rebuild