what? Git is very much distributed and while you can have a main branch, you can set as many up streams as you want and merge things sideways.

It’s trust less in the sense that commits can’t be easily forged and are signed with cryptographic keys and identities-- as in, I don’t have to trust that the source code is genuine since I can verify the commit history myself.

Consensus is just a pull request.

That wiki article literally lists Bitcoin and Ethereum as implementations of Merkel trees.