As we all know that Laravel 5.3 is now released with lots of new features and it is available for everyone.
But it is still in development stage but you can clone laravel 5.3 project from official repository of laravel/laravel.
Run this command in your terminal to clone official repository laravel/laravel.
$ git clone https://github.com/laravel/laravel
If you want to checkout the develop branch then run this command :
$ git checkout develop
Best way to install Laravel package from composer or Laravel Installer.
To download the Laravel installer via composer run following command :
composer global require "laravel/installer"
But make sure to locate
laravel executable by your system you will have to place the
~/.composer/vendor/bin directory in your $PATH.
Now by using
laravel new command, you can create a fresh laravel installtion in specified directory.
laravel new myproject