Hello Armin, > (1) Do you (Savannah Hacker team) happen to have a GitHub account > that you would like to use for pushing to the GitHub mirrors?
GitHub uses non-free software. Savannah can't officially sanction using non-free by having an official account. Mirroring can be done by anyone. And indeed many projects have source code mirrored there. But Savannah processes itself cannot use any non-free software nor endorse non-free software. However I don't see a problem with triggering a mirroring push to one of your accounts as long as only libre free software is involved on the Savannah end. Bob