Stumbled across this fella on Twitter today, noticed he worked at Slide (who make successful/annoying Facebook Apps). None the less (I joke) he writes a blog at http://www.unethicalblogger.com/ and has recently been writing a series of ‘ProTips’ on using Git Repos for his work colleagues.
I think it might prove useful: http://www.unethicalblogger.com/blog_categories/git will be taking a read in my spare time.