It seems to be late commits on public githubs account. Maybe filtered by curse word. The default picture on the avatars seems to be the little cute octopus thing of github.

It makes a call to this thing: http://www.wdyl.com/profanity?q=interesting

http://fffff.at/googles-official-list-of-bad-words/ if you want the complete list of offenders

Other filter words appear to be 'wow' and 'balls'

managed to find this: https://github.com/astanway/Commit-Logs-From-Last-Night