You may be wondering to yourself, WTF, I have a mock orange and it does not look like that! That's the problem with common names for planties - they can overlap and one plant can have like 50 different pet names making identifying the plant a challenge. When you can remember it, go for the latin name. It's not bloody pretentious. It just makes growing stuff easier.
So, yes, there are two mock oranges. One is Mexican Mock Orange or Choisiya ternata. The other, the guy we're talking about here, is Philadelphus. I have a Philadelphus (Phila) growing in my back yard and I think it is prettier and has better smelling flowers than it's Mexican cousin. They are white fragrance bombs that grow along these arching long stems like a white flower rainbow (can a rainbow be white? Is that a massive contradiction? It's poetry. Solved.)
Phila will grow without any real attention in just about any soil and she's AMAZING for filling out bouquets.
She is, however, often deciduous so you will have a bundle of sticks over the winter but I think it's worth the summer floral explosion.
There are many species of Philadelphus out there so choose one that suits your specific site and needs. Generally, they will grow to a max of 2.5x2.5 metres and take about 5-10 years to reach maturity.
Here's a little graphic for you if you wanna make a collection.