There is a rel-eng request to enable F23 updates-testing atomic ostrees.
https://fedorahosted.org/rel-eng/ticket/6279
I attached a patch that uncomments the existing configuration in ansible to enable this.
https://fedorahosted.org/rel-eng/attachment/ticket/6279/0001-bodhi-Enable...
This change affects bodhi-backend01 and can easily be reverted if the composes fail.
Thanks,
luke