You will surely have a lot of unanswered questions about how Git works, even after the actions performed so far. For instance, how does Git store each version of a file? What really makes up a commit? Where did those funny commit numbers come from? Why the name master? And is a “branch” what I think it is? Good questions.

The next chapter defines some terminology, introduces some Git concepts, and establishes a foundation for the lessons found in the rest of the book.