Interesting. Never heard of the Czechoslovakian wolf dog breed.
Sounds (based on your description) like a breed that had obtained some wolf DNA from one or more crosses a while ago, but has since then been kept and bred as a dog. What percentage of "wolf" DNA do they have?
I would guess that if there were bred for generations and kept as dogs, that is what most people would call them. That does not make it a scientifically based name.
Some "huskies" are derived from hybrids with wolves. Those are the ones I was referring to when I said huskies vs. wolves, which could have better been termed husky-wolf. I have seen lots of these dogs their owners claim to by the result of crosses with wolves. Presumably (if the owners are correct) these would have a 50-50 mix of dog and wolf DNA (other than the mitocondrial DNA which comes only from the mother). Can't say for sure that's correct though.
If these hybrids were then bred to other dogs (especially if it was done repeatedly over several generations), the wolf DNA would be diluted out by the continual introduction of 50% dog DNA each generation, then the percentage of wolf DNA would be reduced. In addition, with or without the continued input of dog DNA, there would be selection pressures on the wolf-dog hybrid to remove from its genome DNA coding for traits that would be non-adaptive to living with humans (such as leading to aggression toward humans). This would selectively remove those traits and the DNA associated with them, reducing the overall wolf DNA content somewhat. Perhaps this happened with the Czechoslovakian wolf dog breed.
Most breeds of dog are the result of a long slow process of domestication (which is considered to be mostly selection on the proto-dogs as a consequence of living with and getting along with people). I would consider pure bred huskies fully domesticated, a wolf-husky hybrid maybe not. There is not a clear bright line separating domesticated from non-domesticated. There have been https://www.physicsforums.com/search/62606384/?q=dog+domestication&o=relevance on this subject (including experimental
domestication of foxes) as well as lots of things on the web that can be found through places like
wikipedia.