title: fatal: could not create work tree dir 'kivy'
body: <p>I'm trying to clone my fork of the kivy git, but it's not working. I've made the fork correctly, I believe, but when I type this into my Mac terminal:</p>
  
  <blockquote>
    <p>git clone <a href="https://github.com/mygitusername/kivy.git" rel="noreferrer">https://github.com/mygitusername/kivy.git</a></p>
  </blockquote>
  
  <p>I get this error:</p>
  
  <blockquote>
    <p>fatal: could not create work tree dir 'kivy.: Permission denied</p>
  </blockquote>
  
  <p>Anyone see what I am doing wrong? Thanks!</p>