For `gbp` and `sbuild`, this is what I ended up having to do:
gbp buildpackage --git-builder="sbuild --source-only-changes --debbuildopts='--buildinfo-option=-O'"
For `gbp` and `sbuild`, this is what I ended up having to do:
gbp buildpackage --git-builder= "sbuild --source- only-changes --debbuildopts= '--buildinfo- option= -O'"