Ask HN: Why does OS project show history only from the first functional version?

I came to notice that the first commit of open source projects already show complete versions. However, in my opinion it would be good to have a history before the first functional version. Particular to understand the code. Some examples of repositories showing my point: https://github.com/python-git/python/commits/master?page=1179 https://github.com/angular/angular.js/commits/master?page=125