About download failure due to inability to access github.com

[pptfz]

Due to some special reasons, github.com cannot be accessed in my area, but there are some accelerated addresses that can be used. May I ask which files should I modify to replace github.com with the accelerated address that I can use here

[ankitcharolia]

@pptfz kindly try this GO Version Manager: https://github.com/ankitcharolia/goenv