It's easy nowadays because it's popularity forced everyone to build integration. Git is a absolute nightmare to integrate with CI tools though if you actually have to develop the integration yourself. Git has no native way to reliably tell you what you actually worked on in a branch. Yes it has git diff but that is not precisely the same, and git log is A. not easy to consume B. unreliable since git has so many methods to rewrite history. If you're using something like GitHub it's obviously much easier to use their API but even that is quirky sometimes.