Real time get - URL size limitation

[Zarski, Jacek]

Let's say there is a collection with a schema that specifies 5000 elements.  I 
would like to make a "real time get" call to retrieve a large subset of those 
elements. Currently I am limited by the size restriction of the HTTP GET method 
if I want to make that request be "real time" since I would have to specify 
each field in the "fl" parameter. Is there a way to circumvent the limitation 
of url size? Maybe a POST call with a body or something of the sort?