Ask HN: How do I show a company that I'm worth hiring?

I want to start applying to companies looking to hiring junior developers, but I don't seem to meet the requirements for any of them.

I don't have a college degree. I don't have an amazing GitHub account. I'm not the best programmer in the world. I'm certainly not a "rock star" or a "ninja".

What I DO offer is passion and the ability to learn quickly. What else do I need to convince a company to hiring me?