Retroactively justifying things is what we always do. Here's an excerpt from Dan Ariely's "The (Honest) Truth About Dishonesty":

> The experience taught me that sometimes (perhaps often) we don't make choices based on our explicit preferences. Instead, we have a gut feeling about what we want, and we go through a process of mental gymnastics, applying all kinds of justifications to manipulate the criteria. That ways, we can get what we really want, but at the same time keep up the appearance -- to ourselves and to others -- that we are acting in accordance with our rational and well-reasoned preferences.

Simply replace all occurrence of "we" with "mercurial/git fanboys" based on your own preferences ;)