How to download and setup themekit
Open terminal and run command
git clone https://github.com/Shopify/themekit.git
git clone is used to create a copy or clone of themekit repositories.
You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with themekit https://github.com/Shopify/themekit/archive/master.zip
Or simply clone themekit with SSH
[email protected]:Shopify/themekit.git