When talking about repositories, current is a subjective term. The same is true for which is best.
The OpenWatcom repository Gregg and I maintain was intended as a placeholder until Michal got openwatcom.org back up an running. The lack of an issues tracker was an oversight, which has been corrected. Silvan is the first to mention it.
Gregg and I had commits that needed to be made, so the repo came to be.
The repository is a fork of Jiri Malak's
https://github.com/open-watcom/owp4v1copy, which is about 3 years old.
Jiri's owp4v1copy was current as of when the Perforce repository went away.
Jiri's owp4v1copy is significantly newer than iainnicol's.
Jiri's OpenWatcom repositories have been around for a while. He created them back in 2012.