How git clone actually works

Question

I have a repository on Github with 2 branches: master and develop.

When I clone the repository and run $ git branch it shows only

Answer 1

To put it simply, git clone repository-url does the following things, in order:

1. Creates a new empty repository.

   git init
   

2. Creates a remote called "origin" and sets it to the given url.

   git remote add origin repository-url
   

3. Fetches all commits and remote branches from the remote called "origin".

   git fetch --all
   

4. Creates a local branch "master" to track the remote branch "origin/master".

   git checkout --track origin/master
   

An interesting point is that a fork (in GitHub or Bitbucket) is just a server side clone.