title: git copy Files from [branch] and paste at under other [branch or master]
body: <p>I created repository as following ...,</p>
  
  <pre><code>TestRepo.git
      |
      |_[Branch.Master]
               |____________Master.txt
      |_[Branch.Develop]
               |____________Develop.txt
  </code></pre>
  
  <p>I want to copy <code>Develop.txt</code> and paste under <code>[Branch.Master]</code>.</p>
  
  <pre><code>/// So I checkout Develop first.
  $ git checkout Develop
  /// Then I push develop.txt to remote/master
  $ git push origin develop:master
  /// Then I pull remote/master to my local/master.
  </code></pre>
  
  <p>Then I got below result which is not what I want.</p>
  
  <pre><code>TestRepo.git
      |
      |_[Branch.Master]
               |____________Develop.txt
      |_[Branch.Develop]
               |____________Develop.txt
  </code></pre>
  
  <p>What I want is like below.</p>
  
  <pre><code>TestRepo.git
      |
      |_[Branch.Master]
               |____________Master.txt
               |____________Develop.txt
      |_[Branch.Develop]
               |____________Develop.txt
  </code></pre>
  
  <p>I don't want to be replaced, what I want is just append.
  <br></p>
  
  <p>I appreciate your suggestion(s).</p>