$ git clone -n https://src.fedoraproject.org/rpms/maildir-utils.git /var/lib/mock/f42-build-3282784-41399/root/chroot_tmpdir/scmroot/maildir-utils
Cloning into '/var/lib/mock/f42-build-3282784-41399/root/chroot_tmpdir/scmroot/maildir-utils'...
$ git fetch origin abfe8db86976d45766c42af1e383ff72d89b041d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maildir-utils
 * [new ref]         abfe8db86976d45766c42af1e383ff72d89b041d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at abfe8db Merge #9 `Update to upstream 1.12.8 (rhbz#2299553)`