Listing each branch and its last revision's date in Git

Question

I need to delete old and unmaintained branches from our remote repository. I\'m trying to find a way with which to list the remote branches by their last modified date, and

Answer 1

Here is what I came up with after also reviewing this.

for REF in $(git for-each-ref --sort=-committerdate --format="%(objectname)" \
    refs/remotes refs/heads)
do
    if [ "$PREV_REF" != "$REF" ]; then
        PREV_REF=$REF
        git log -n1 $REF --date=short \
            --pretty=format:"%C(auto)%ad %h%d %s %C(yellow)[%an]%C(reset)"
    fi
done

The PREV_REF check is to remove duplicates if more than one branch points to the same commit. (As in a local branch that exist in the remote as well.)

NOTE that per the OP request, git branch --merged and git branch --no-merged are useful in identifying which branches can be easily deleted.

[https://git-scm.com/docs/git-branch]