Over time a git repository can end up with a lot of feature branches. Most of these are not much use once they’ve been merged into the main branch.
The following command shows a list of all local branch names, along with the date of their last commit:
git for-each-ref --sort=committerdate refs/heads/ --format='%(committerdate:short) %(refname:short)'
Produces output like:
2015-10-12 feature-branch-name 2016-01-15 another-feature-branch 2016-03-16 one-last-feature-branch 2017-05-24 master