How does one change the git config core.autocrlf from true to input?

I have tried using the command git config core.autocrlf input and it returns a fatal: not in a git directory error message. I have also used the command git config --global core.autocrlf input which does change it in the global directory, however this does not help me because still in my projects, it takes from the git config --list and not the git config --global --list.