Branch is semantic. The true unit is commit and the tree is applying a set of commits. Branching is just selecting a set of commits for a tree. There’s no wrong or right branch, there is just the matter of generating the wrong patch
Branches are mutable and regularly point to a new commit. Branching is selecting an active line of development, a set of commits that change over time.
That's why git also offer tags. Tags are immutable.
