Note also that jj does have branches, they are just anonymous. You don't checkout a branch or edit a branch, you edit a revision or make a new one. One revision

Note also that jj does have branches, they are just anonymous. You don't checkout a branch or edit a branch, you edit a revision or make a new one. One revision with multiple children is a branching point, one revision with multiple parents is a merge. You name them with bookmarks which are sort of like branch names except they don't follow along automatically as you make new revisions. You can point an existing bookmark at a later revision when you're ready to push new changes.