The underlying idea is: as a hacker, and as a first step, the onus is on you to come up with the explanation‡ yourself, not expect the burden of education on somebody else's back to be carried towards you. Same goes for other (potential) git users in a similar situation. It is okay to disagree with this, but then one would mark oneself as a member of the out-group. HTH; HAND

‡ We are blessed to live in the information age. The explanation is abundant and easy to find, literally within seconds: <https://git-scm.com/book/en/v2/Git-Internals-Plumbing-and-Po...> <https://stackoverflow.com/questions/6976473/what-does-the-te...>