I talked with Chad today and together we redid:
* https://www.mediawiki.org/wiki/Git * https://www.mediawiki.org/wiki/Git/Conversion - the schedule for Git conversion * https://www.mediawiki.org/wiki/Git/Workflow - describing the workflow for gerrit, git-review, and any other relevant tools we use * https://www.mediawiki.org/wiki/Git/Guide - Basic guide to using git. Trying not to duplicate docs elsewhere on the web -- keep this appropriate for our users and link generously to outside resources
Hope this helps. You can expect more communication from Chad on this next week, as well as a blog post.