The difference is that "git flow" is there, documented, often already familiar with engineers. As opposed to something, however simple, that you design yourself

The difference is that "git flow" is there, documented, often already familiar with engineers. As opposed to something, however simple, that you design yourself. I don't think the term "overengineering" applies when you take an industry practice off the shelf. If anything is overengineered, it would be the simple solution that you "engineer" in house.