My approach: refage = ! git for-each-ref --format='%(committerdate:relative),%(authorname),%(refname)' --sort -committerdate | column -t -s ',' This will

My approach: refage = ! git for-each-ref --format='%(committerdate:relative),%(authorname),%(refname)' --sort -committerdate | column -t -s ',' This will list all refs (including tags, so you might want to grep the output), their relative ages, and who the last commit author was, and then formats it nicely. This makes it easy to see how many branches there and how old they are, as well as who to contact to request deletion.