How can I override the sort variable? For my view in Drupal 8 I have added a sorting criteria based on the custom field. Now, when I sort the content in the url one can see a sorting value as a name of that field. 

Like ?sort_by=field_custom_value

How can I override the value of the sort criteria, so that the path doesn't look so ugly. 

Expected: ?sort_by=something_different
This module might help Query Parameters To URL. 

There's a D8 sandbox: Drupal 8 port 

The module seems very useful, maybe it would get more attention if more people used it.