Winter CMS is fully compatible with Composer, the de-facto standard for PHP package management.
With Composer, you have full control over the installation of Winter CMS, allowing you to set up your Winter CMS install, download your necessary plugins and themes immediately and even use automated tools to streamline your development setup and deployment.
Getting all the files and dependencies of Winter CMS through the command line is as simple as:
composer create-project wintercms/winter mywinter
Once you have all the files, you can configure Winter CMS just the way you like.
More info on installing through Composer