Using a header isn't quite right. Just implement an URL on your app at /_revision that grabs the HEAD commit. Then write a git-diff-prod command like this: #

Using a header isn't quite right. Just implement an URL on your app at /_revision that grabs the HEAD commit. Then write a git-diff-prod command like this: #!/bin/sh git-diff `curl -s "http://www.yourapp.com/_revision"` Get your paths squared away, chmod +x it, then type in: git diff-prod And boom! Instant diff with head in production. Of course, you might want to get your deploy scripts squared away for figure out why your servers aren't restarting if thats the reason for this.