As of Nov 1st 2016, active development on "Windows for OpenSSH" is being done in https://github.com/PowerShell/openssh-portable. 

This repo (https://github.com/PowerShell/Win32-OpenSSH) is being maintained to keep track of releases and issues.

Release History:
7/26/2018 -- Release 7.7.2.0 with source https://github.com/PowerShell/openssh-portable/releases/tag/v7.7.2.0