Add a Git remote named »all« which groups all existing remotes

git-add-all-remote.sh

#!/bin/bash

# Source: https://akrabat.com/git-push-to-multiple-repositories/

if [ "`git remote| grep all`" == "all" ] ; then
    git remote remove all
fi

for r in `git remote`
do
    git config --add remote.all.url `git config remote.$r.url`
done

Installation

wget [URL to raw gist]
chmod +x git-add-all-remote.sh
mv git-add-all-remote.sh /usr/local/bin/git-add-all-remote

Usage

cd [some-git-repository]
git-add-all-remote

# now instead of `git push origin && git push another-origin && git push yet-another-origin`
# run the following command to push to all remote repositories at once:
git push all

# to remove or update the »all« origin, run `git-add-all-remote` again