I’ve been tinkering with git and github. Here’s an intro to git:
http://pivotallabs.com/talks/80-git-for-newbies
Here’s a git cheat sheet:
http://ktown.kde.org/~zrusin/git/git-cheat-sheet-large.png
Some docs:
http://git-scm.com/#documentation
And some more docs (with info on fast forwards):
http://www.kernel.org/pub/software/scm/git/docs/git-push.html
My github page:
http://github.com/facetcounter
A git book online:
http://progit.org/book/