Revert "build.cmd: github is source of truth now"
Revert "build.cmd: github is source of truth now"

This reverts commit d7af258eb7c1e115a228cb92098c1ee1b2328917.

I renamed /git/factor-github.git to /git/factor.git

AlexIljin/factor,mrjbq7/factor,tgunr/factor,tgunr/factor,mrjbq7/factor,mrjbq7/factor,factor/factor,factor/factor,AlexIljin/factor,factor/factor,factor/factor,factor/factor,tgunr/factor,AlexIljin/factor,mrjbq7/factor,bpollack/factor,tgunr/factor,AlexIljin/factor,mrjbq7/factor,AlexIljin/factor,AlexIljin/factor,tgunr/factor,bpollack/factor,bpollack/factor,bpollack/factor,bpollack/factor,tgunr/factor,factor/factor,bpollack/factor,AlexIljin/factor,mrjbq7/factor,bpollack/factor