Synchronize code between multiple Git repositories using a single command

I used Jigarius tutorial to learn how to configure one or more Git remotes, in my case GitHub and Bitbucket, and push code to them with a single command. So, I can now with a single command like 'git push all BRANCH' or 'git push origin BRANCH' push code to multiple remote repositories to the desired BANCH. You can find this tutorial at https://jigarius.com/blog/multiple-git-remote-repositories