visionmedia/git-extras — pull request #210 by shurane (2014-02-13 00:19:32+00:00)
Title: Replaced $(DESTDIR) with $(PREFIX) and $(MANPREFIX)

I noticed `$(DESTDIR)` wasn't being used, and it got in the way of
installing `git-extras` via the following command:

PREFIX=$HOME make install

Since I like to avoid using `sudo`, I thought I'd rewrite it. Pretty
simple.