Delete all remote remote git branches, except 'master', and 'stage'. Run usinb bash instead of sh.

delete_multi_remote_branches.sh

#!/bin/bash

declare -a skip_branches=("master" "stage")

# Credits due http://stackoverflow.com/a/10312587/2790481
for remote in `git branch -r`; do git branch --track ${remote#origin/} $remote; done

branches=$(git branch)

function branch_should_not_be_skipped {

    branch=$1;

    for current_branch in $skip_branches; do
        
        if [ "$branch" == "$current_branch" ]; then

            return 1;
        fi

    done

    return 0;
}

for branch in $branches; do
    
    if branch_should_not_be_skipped $branch; then

       git push origin --delete $branch

    fi 

done