The one shipped by Apple on OS X 10.11.6 is 2.7.4, which was released in March this year. That's hardly "way outdated".
> Better off install the latest version using homebrew.
The Git project provides package to install binaries for OSX. Homebrew's name would be more accurate to the reality of the product if it's name was bathtub-whiskey.
Note that Git ships with Xcode, not part of OS X itself. Xcode 7.3.1 updated Git to v2.7.4. Xcode 8, likely to GM in the next month or two, includes Git v2.8.4.