Git is great. The output from git log is not!

One of my favourite tools to work with git is tig. Among other things tig is a great repository/history viewer for git. If you're on Mac OSX and have homebrew setup then all you need to do to install tig is:
brew install tig

Then go to a git repo on your computer and run tig and you get great output like:

You can see individual commits and where each remote branch is up to. In the above screenshot I am on the master branch and I can see that my remote branch heroku is four commits behind as is origin.

You can also see the diff for any commit:

Here I've selected an individual commit and tig shows me all the changes.

Tig also has a very nice status view. So if you like the above tree view try tig status.