[ocdtrekkie]

I imagine in this case, some of the recruiters may only have a cursory understanding of the job requirements. Evaluators may know you need to mention Python, but not what a pull request is, or how to look at what you've contributed on GitHub. They may be asking the question to simply provide whatever answer you give to someone more qualified to evaluate it. (Also, even if they look at your GitHub, they may want to see how you answer in person. I've definitely been asked questions that were answered on my resume, but it's also sometimes a conversation starter to a deeper topic.)