I added http://greenkeeper.io to https://github.com/billymoon/monsieur which was straight forward, with a pull request being generated, which I merged. I tried to do the same on another project (https://github.com/billymoon/sir) and it is showing disabled. It also is not able to merge the greenkeeper/initilial branch, because there are no changes not in master (as it was merged: https://github.com/billymoon/sir/commit/b5f20afa85c819a1566528d4b54a8d4bb7e5c850).
How can I get greenkeeper initialised in my repo?