How do I sign commits in Git? Warning - options not active

I am using Windows to sign my commits and push. I have tried using gpg command on cmd after installing git-bash.

gpg --list-secret-keys --keyid-format LONG

But seems like I am doing something wrong, the warning that I am getting is -

Warning - options in 'C/Users/.../gpg.conf' are not yet active during this run

Solution

Well that just seems to be a warning when you start of using gpg. Try this :

gpg --gen-key

and then follow the steps selecting a key of your choice. Once you have completed these steps, try again the same command

gpg --list-secret-keys --keyid-format LONG

Source - Github Documentation