This script deletes branches that doesn't exist on the remote

delete-orphan-branches.sh

cd $1
declare -a BRANCHES=(`git for-each-ref --format='%(refname:short)' refs/heads/`)
CURRENT=(`git rev-parse --abbrev-ref HEAD`)
for BRANCH in "${BRANCHES[@]}"
do
    EXISTS=(`git ls-remote --heads  origin refs/heads/"$BRANCH" | wc -l`)
    if [ "$CURRENT" != "$BRANCH" ] && [ "$EXISTS" = 0 ]
    then
        git branch -D "$BRANCH"
    fi
done