The proper "open-source-if-a-bit-dickish" way would be to do exactly what the .NET Foundation did here, but where the letter said "You will need to add this admin for compliance with our policies" that word policies would be studded with footnotes to policy pages, reams of meeting minutes, and archives of open mailing list discussions.

Apache and Eclipse and others all mandate that they control a lot of minutia of source control like what .NET Foundation seems to want to be doing with their GitHub Enterprise account, but their transparency policies mean all of the discussions of that are open and no one is surprised when changes happen.