problem with insider build for windows and git

when running commands like pull and clone I get the following message:

Cygwin WARNING:
   Couldn't compute FAST_CWD pointer.  This typically occurs if you're using
   an older Cygwin version on a newer Windows.  Please update to the latest
   available Cygwin version from https://cygwin.com/.  If the problem 
persists,
   please see https://cygwin.com/problems.html

Windows build is version 1607, OS BUILD 15002.1001

I assume they broke something that cygwin was depending on.