E.g.
  fetchFromGitHub {
    owner = "NixOS";
    repo = "nix";
    rev = "ad42a784690449873fccb20192bd2150da81c56d";
    hash = "sha256-ZXeadXUJMXV5lSLz6TOBeL/SSOVwQ8ywxU5AFMCnbRU=";
  }
		
	
E.g.
  fetchFromGitHub {
    owner = "NixOS";
    repo = "nix";
    rev = "ad42a784690449873fccb20192bd2150da81c56d";
    hash = "sha256-ZXeadXUJMXV5lSLz6TOBeL/SSOVwQ8ywxU5AFMCnbRU=";
  }