How do productive human relationships form?

One interaction at a time.

To align many interactions over time, there is a minimal probability that that happens by chance. Otherwise, it happens through commitments.

Two people making one or more commitments can result in getting more done together.

Git Commits

The base unit of contribution when using Git is a commit. A commit is a change to one or more files in a file system. Git is often used by software developers to manage code used for software applications, but Git can be used for written documents, legal documents, to-do lists, and pretty much any use case involved files of digital documents.