Error building project from codepen

I’m having trouble building a project from a codepen repository
I can build an ordinary project fine but it won’t let me use a codepen URL as a repository

I’m trying to build based on:

My command:
ionic start myapp https://codepen.io/mhartington/pen/wBJxwp

git clone https://codepen.io/mhartington/pen/wBJxwp myapp --progress
Cloning into ‘myapp’…
fatal: repository ‘https://codepen.io/mhartington/pen/wBJxwp/’ not found
[ERROR] An error occurred while running git clone https://codepen.io/mhartington/pen/wBJxwp myapp --progress (exit code
128).