How to prove the ownership of a public git/github repo?

Question

How can I clearly prove to other persons (for example very picky employers) that I'm the creator of a public GitHub repo (beside avatar pictures etc.)?

Does Git have something like a key file that proves the authencity of a repo or is there a best practice for doing so?

Answer 1

You could add a signed tag to the repository.

This is a gpg signature, so it can be cryptographically verified. I wrote about how to go about it here