$ git config --global core.askPass ""

$ git -c core.askPass="" clone <https_url>

[credential "https://example.com"]
    username = me

unset SSH_ASKPASS

env | grep GIT
git config --get core.askPass
env | grep SSH

SSH_ASKPASS=/mingw64/libexec/git-core/git-gui--askpass`.

git config --global --unset credential.helper

git config --system --unset credential.helper