Yes, it's a nice tutorial but I've already been using git for a couple of years. It's just that my work won't let me install it because I'm not officially IT.
Start looking for another job. Fast. Seriously, though, that's a pretty unfair policy to apply to developers. Every developer I know has widely different tool preferences, and I can't imagine working in an environment where I can't install random free utilities that make my job easier. A strict policy may make more sense for less computer-literate users, but man, every IT department should acknowledge that developers can handle installing software on their own machine.