git submit code with error "fatal: unable to access ': Could not resolve host: github.com"

• You can refer to this article: Github: fatal:unable to access 'https://github.com/... /.git ':Could not resolve host:github.com
• Among other things, this blog: 4. fatal: unable to access 'https://github.com/... /.git ': Could not resolve host: github.com The section might solve your problem. You can read it carefully or in the source blog:
  

• Just execute

  from the command line.

  git config --global --unset http.proxy 
  git config --global --unset https.proxy
  

hosts file parsing problem

Just run the following command on the command line:
git config --global --unset http.proxy
git config --global --unset https.proxy