In jsfiddle.net if one choose framework as jQuery or Mootools they will get an option for choosing jQuery ( edge ) and Mootools( edge ).
I googled it quite a bit but did not get any good answers. My questions are
It is the jQuery nightly build from github...
jQuery JavaScript Library v1.6.3pre Live From Git (b22c9046529852c7ce567df13397849e11e2b9cc)
Here is the link: link (jsfiddle uses this)
Here is the jQuery github link: github-link