Install the package globally in your machine:

npm i -g Bannerwise/cz-jira-smart-commit#master

On the repo you wanna commit, create a file .cz.json with the following content:

{
  "path": "/Users/irotnes/.nvm/versions/node/v15.5.0/lib/node_modules/cz-jira-smart-commit"
}

Replace irotnes with your user and make sure you are pointing to the correct installation folder (check your node version!)

Once that's done, you can commit to a repo by running git cz in the project root.