How to git work?

sequenceDiagram
    box Local
    participant Working Directory
    participant Staging Area
    participant Local Repo
    end
    box Remote
    participant Remote Repo
    end
    Working Directory->>Staging Area: git add
    Staging Area->>Local Repo: git commit
    Local Repo->>Remote Repo: git push
    Remote Repo->>Local Repo: git fetch
    Local Repo->>Working Directory: git merge
    Remote Repo->>Working Directory: git pull
    Remote Repo->>Local Repo: git clone
    Local Repo->>Working Directory: git checkout