Osx 10.15.3, install error,

curl: (7) Failed to connect to raw.githubusercontent.com port 443: Connection refused
when i install teh homebrew in my mbp, the shell reply this informa
would anyone tell me how to work out this trouble?
thank you very much !!!

it is better more guide details, I am good at OS X shell

Your network is refusing the connection to github.com there’s not much I can do remotely to help you debug that. Maybe you can get more information using curl -v github.com?