A concrete example how I automated a chore update of multiple repostitories that I do not own => to create pull requests (PRs) with the same simple change in each repo.
- Install https://cli.github.com/ and
gh auth login mkdir testingjavascript && cd $_- Navigate to a GitHub topic like https://github.com/topics/testingjavascript (or epicreact-dev, ...) to get a list of repo links, e.g. execute following in browser console:
copy([
...new Set($$('h1 > a[href^="/kentcdodds/"]').map(el => `gh repo fork ${el.href}.git --clone --remote`))