This custom component repository is unrelated to the Home Assistant Core repository.
Most of the times it is some commits ahead of the core repository.
To create a PR to this repository please install this commit hook:
python3 -m pip install pre-commit
pre-commit install
Make sure to setup the development environment like as described here.
Create a patch from a given commit e.g. with git format-patch HEAD~1 and apply it on the HA Core repo with this command:
git am -p2 --directory=homeassistant/components path_to_ha_vicare/custom_components/vicare/0001-some.patch