release_dates.sh

gistfile1.sh

pattern='release_'
all_release_branch_names=($(git show-ref | egrep "$pattern" | cut -d' ' -f 2))
for branch in "${all_release_branch_names[@]}"; do
     commit_where_it_branched_from_master=$(git merge-base ${branch} master)
     git show $commit_where_it_branched_from_master -s --pretty=format:"$branch branched from master on %cd"
done