Since jQuery.get is just a shorthand for jQuery.ajax, another way would be to use the latter one's context option, as stated in the documentation:
The
thisreference within all callbacks is the object in the context option passed to$.ajaxin the settings; if context is not specified, this is a reference to the Ajax settings themselves.
So you would use
$.ajax('http://www.example.org', {
dataType: 'xml',
data: {'a':1,'b':2,'c':3},
context: {
url: 'http://www.example.org'
}
}).done(function(xml) {alert(this.url});