GitHub - failed to connect to github 443 windows/ Failed to connect to gitHub - No Error

 https://stackoverflow.com/questions/18356502/github-failed-to-connect-to-github-443-windows-failed-to-connect-to-github

If you are not using Proxy and still facing this issue, you should use below answer -

git config --global --unset http.proxy

Simply hit this command, and this will fix the issue.