How to get the newest ruby src

if is it ? :

git clone git://github.com/ruby/ruby.git

Hello,

If you mean the development src is:
git clone [-b trunk] GitHub - ruby/ruby: The Ruby Programming Language

But the stable edition is in the branch for 1.9.3:
git clone -b ruby_1_9_3 GitHub - ruby/ruby: The Ruby Programming Language

Regards,
Jose

thanks