gpg failed to sign the data fatal: failed to write commit object [Git 2.10.0]

Question

I followed few articles over the pretty attributes on Git 2.10 release note. Going through which upgraded the git to 2.10.0 and made changes to global .gitconfig

Answer 1

If gnupg2 and gpg-agent 2.x are used, be sure to set the environment variable GPG_TTY.

export GPG_TTY=$(tty)

See GPG’s documentation about common problems.