I don't think there is a precise rule. because the exact meaning depends on the context. In part 3 of the series, in the section about "branches are fictitious

I don't think there is a precise rule. because the exact meaning depends on the context. In part 3 of the series, in the section about "branches are fictitious", that's what I will say. The talk has an abbreviated version: https://perl.plover.com/classes/git-tips/samples/slide018.html https://perl.plover.com/classes/git-tips/samples/slide018.ht... It's an illustration of just one example of this: If we rebase "branch X" onto commit B, we rebase only the three green commits. But if we rebase it onto C, we consider X to contain the two dark blue commits also. Are the dark blue commits part of branch X? It depends on what you're trying to communicate.