$ git clone -n https://src.fedoraproject.org/rpms/fedora-repo-zdicts.git /var/lib/mock/f40-build-1996295-44000/root/chroot_tmpdir/scmroot/fedora-repo-zdicts
Cloning into '/var/lib/mock/f40-build-1996295-44000/root/chroot_tmpdir/scmroot/fedora-repo-zdicts'...
$ git fetch origin f9c76ae6119dc8c55fabecc358b689fc1c30bdc3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fedora-repo-zdicts
 * [new ref]         f9c76ae6119dc8c55fabecc358b689fc1c30bdc3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9c76ae Update with F39 dictionaries and drop F36 dictionaries