Troubleshooting GPG issues in GitEdit

I was seeing commits fail with:

error: gpg failed to sign the data
fatal: failed to write commit object

Running with GIT_TRACE=1 (eg. GIT_TRACE=1 git commit ...) revealed that it was trying to run this command:

10:59:49.263641 run-command.c:654       trace: run_command: gpg --status-fd=2 -bsau 'Greg Hurrell <>'

ie. it was trying to use the wrong email address.

Some related troubleshooting commands that I ran while investigating (unfortunately, I jotted these down so long ago I can’t remember why I was looking into hostname stuff while troubleshooting the GPG issues… 🤦 — maybe it had nothing to do with it):

scutil --get ComputerName
scutil --get LocalHostName
scutil --get HostName

sudo scutil --set HostName $NAME

killall gpg-agent

Via: StackExchange, "OS X computer name not matching what shows on terminal"