This article goes into a little too much detail imho. I have had great success explaining Git to coworkers using post-its, permanent marker and a flip board (no

This article goes into a little too much detail imho. I have had great success explaining Git to coworkers using post-its, permanent marker and a flip board (no computer!) and going through the steps Git would take (abstractly, not exactly) when performing certain commands. All commits (and their relations) are written down on the board with the marker because they don't change (eg: rebasing just creates a new line of commits). The branches are written down on post-its and can move around (like this article explains, they are just pointers). You can use a whiteboard with non-permanent marking for the working directory and index if you want to go that deep.