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.