Retrieve all locations (libraries, lists, sites, even list items, documents) where group used

Hi All,

I have a situation where due to some custom tool migration of permissions from one 2013 site to another 2013 site, the tool messed up and created new junk groups.

Like in source site , SharePoint Group Name was SAS Administrator and in the destination site now we have SAS Administrator and SAS Administrator(1).we want to clean up all the unwanted groups. I have a SharePoint 2013 farm and so i need a powershell script to find out where all this new group SAS Administrator(1) is being used .. Any leads will be very very helpful to us.thanks