How to configure Magento 2 to have personal/private develpment extensions just for myself

I have several development tools which I personally use like:

• https://github.com/ho-nl/magento2-Ho_Templatehints
• https://github.com/mage2tv/magento-cache-clean

Is it possible to somehow configure and use it for myself? Other team members are not using it.

The specific issues:

• app/etc/config.php is in the repo, I cannot commit it
• composer.json and composer.lock are in the repo, I cannot commit it

I would like to use both modules and enable them without changing any repo files. Would that be possible?