I think there isn’t really something “authoritative” in Git. You can upload your changes somewhere or another developer can download changes from you. You can also all make incompatible changes and then you won’t be able to sync it anymore (you’d need to fix that first and manually handle the conflict). There’s nothing authoritive in it. In practice most people choose a central place and all upload their changes there and everybody else regularly pulls them from there. But you could as well directly do it with the computer of your colleague if you have a network connection and access to it. Files including history of changes are the same on every machine and server. (If they’re all up to date). It’s like storing a directory including past versions on 10 different computers.