When she is unsure about a re-structuring of part of the thesis she makes a branch. It happened twice so far. Same reasoning for branching when your are single

When she is unsure about a re-structuring of part of the thesis she makes a branch. It happened twice so far. Same reasoning for branching when your are single author of a repo. containing code, I guess. A major refactor or structural code change or trying sth. "crazy".