For the ones who didn't see the system:
Magento Version 1.x.y.z can be downloaded from
http://www.magentocommerce.com/downloads/assets/1.x.y.z/magento-1.x.y.z.zip
Works for Version smaller (not including) 1.9.2.0 The "problem" with versions 1.9.2.0+ is, that magento makes silent updates - changing code without changing the version number. But thankfully, they add the timestamp to the file now. So this system doesn't work anymore, but we now know the REAL version we download.
Thanks https://gist.github.com/piotrekkaminski/9bc45ec84028611d621e
First you need to generate download token. Login to your account on magento.com and generate it in Account Settings->Downloads Access Token
You will need your MAGEID as well. It is shown at the top-left in your account page.
curl -k https://MAGEID:[email protected]/products/downloads/info/help
Profit!