pkgsrc using git on github

[Mayuresh <mayuresh%acm.org@localhost>]

I came across following two github projects that provide "
Automatically updated conversion of the "pkgsrc" module from
anoncvs.netbsd.org http://www.pkgsrc.org";

https://github.com/jsonn/pkgsrc

https://github.com/joyent/pkgsrc

1. I did not find mention of either in official pkgsrc documentation.
Should it be alright to use these?

2. Further confusion is added by two look alike projects. Not sure why
there are two and which one to use.

Mayuresh.