git-old-branches.sh

git branch -a --merged develop | grep remotes\/origin\/feature | sed 's/^[ \t]*//' | xargs -n 1 git log --pretty=format:"%an - %d - %ar %n" -1 | sort | cat

@nhusher notes:

Each pipe is a "step" in the process, here are the steps described:

1. Gets all the branches merged to develop (if you don't have a develop branch, use master instead).
2. Get all the branches in the feature branch namespace (if you aren't using feature branches, remove this part).
3. Rip out tabs and spaces to get a clean branch name.
4. Run git log on each entry, returning the last commit and the author.
5. Sort by name
6. Write out the result.