We should document all packages, constants, functions, types, and variables following the guidelines at https://go.dev/doc/comment.

This includes:

• Adding a clear package-level comment that explains the purpose of the gitrepo package and what kinds of functionality it provides

• Ensuring that all exported types, functions, and variables are documented with complete, descriptive comments
• Keeping documentation concise, consistent, and useful for future maintainers and contributors.