I was editing some blog posts over ssh, when I ran into this error. gpg was failing to sign my commits. I realized that this was because I could not answer to the desktop keyring over ssh, but had no idea how to fix it.
This is the error message I was seeing.
gpg failed to sign the data ssh
The fix ended up being pretty simple, but quite a ways down this stack overflow post . This environment variable tells gpg that we are not logged into a desktop and it does not try to use the desktop keyring, and asks to unlog the gpgkey right in the terminal.
This is what it looks like when it asks for the passphrase.