Yes, it's basically labeled commit. But when you talk about what it means, you do it in relation to some other labeled commit which will always have common bran

Yes, it's basically labeled commit. But when you talk about what it means, you do it in relation to some other labeled commit which will always have common branching point. Edge cases may mean it's empty content (disconnected branches) or commit itself is branching point (you're not behind, just purely ahead) or your branching point is your immediate parent (commit delta itself). It's a DAG with optionally labelled vertices (content is cyclic of course, commit history is acyclic). It's all potato potato.