add force-if-includes option to push command

[gotschmarcel-ni]

This is a useful option to have along side --force-with-lease. I would've preferred to add a setting to automatically append it when using --force-with-lease, but I couldn't find a clean way to do so.

[gotschmarcel-ni]

It also dependents on force-with-lease, but not sure how to cleanly implement this in your architecture. Any hints are much appreciated.