It seems accurate enough to say the branch includes all the parents of the pointed to commit. It's a matter of definition, but both definitions are technically

It seems accurate enough to say the branch includes all the parents of the pointed to commit. It's a matter of definition, but both definitions are technically accurate. (Also, note the path you ask us to cat does not contain the word "branch". You refer to how things are stored to support your definition, but the way things are stored doesn't use the term "branch".)