A blockchain is one linear branch. Git is just a tree of them, but they're all blockchains. The only other extremely important thing to understand about Git i

A blockchain is one linear branch. Git is just a tree of them, but they're all blockchains. The only other extremely important thing to understand about Git is that it has a way to name commits symbolically (branches and tags), and that those names can be changed, and that leads to understanding what a fast-forward and non-fast-forward change to a branch really is.