Startup Idea: Git Repo Cleaner

Startup idea to create a software tool designed to manage and clean up local Git repositories by removing unnecessary branches and deleting irrelevant information, thereby saving significant time currently spent on manual management.

I am a programmer on several open-source projects that use Git and Github as our Version Control Software. Over time, local Git repositories (that is, the copy of the code stored on our home computers) can become a mess if not properly managed. A piece of software that can clean out a Git repo by removing unneeded branches, deleting information that is no longer relevant, etc. could be quite helpful.

At the moment, all we can do is manage this manually, which takes a significant amount of time. There are no tools available that can perform this sort of mass-cleaning easily that I know of.