developing laravel project without internet on remote desktop

I am working in an organization where i Have to start projects in laravel, but the problem there is that we are working on remote desktop i.e., without internet and without copy & paste of code. Is there any way to develop my web applications on remote desktop? can I download the laravel source code and start development? If Yes, how will I update packages or make commands on composer as composer downloads from internet?

via Chebli Mohamed