You can guarantee that any vine grown from a seed will be a completely new variety. That’s how different varieties originated, up to the 1860’s by chance followed by human selection to propagate them by cloning - i.e. taking and planting cuttings. Lately by human selecting and crossing plants.
Just like a couple of humans who have multiple children - same mother, same father - yet the children aren’t identical to each other or their mother.
Suppose you have a vineyard of solely Chardonnay vines. So you take a Chardonnay grape, extract the pips and plant them. Each pip will produce a new variety. Chardonnay, like most other wine vines is hermaphrodite so can fertilise itself. So the new plant is a Chardonnay X Chardonnay cross - it is not Chardonnay.
Chardonnay was a cross of Pinot Noir and Gouais Blanc. Suppose you have those two and you cross them. The new plant will still not be Chardonnay, same way that two children of the same parent are not identical.
I think you are using the word ‘hybrid’ to mean a cross. By this definition every single vine that we know is a hybrid, i.e. it has two parents like you and me.
In viticulture hybrid is used to mean a cross between different vine species - usually American vine with vitis vinifera. Your new vine will not be a hybrid unless you have different species in your vineyard, or a vineyard planted solely to hybrids.
How you can ensure what the parents are has defeated experts but it requires the removal of male sexual parts from the to-be mother plant, dusting the female flower with pollen from the chosen male and covering the female flower to prevent accidental pollination. That’s it very briefly.