Yup I saw it a each "blog entry" being its own repository with its own history of corrections, updates etc. There was multiple master branches that groups blog entries such as "public" or with other tags. The real fun came because you could publish your git repository and when someone fetched it if they say used http they would only get the public branch and all those commits, but if you fetched using the key "bob" you could get all of the refs that were both public and bob. Those on the public branch would never know that they are missing refs because they have separate roots. And just to make things more fun you could have encrypted messages to boot with private keys.