There is a product called Embark that is a T/O growth regulator. There is another called Edgeless.
I presume you are certified for applications since you chose to apply glyphosate to the fencerow around the property. Assuming you understand that if you have a beautifully green lawn, by applying a 4 inch border will become a 6 inch or more border wide after the gly runs through the stolons and rhysomes. You may make a customer severely irritated. However, by applying a growth regulator after first line trimming the fencing, will and can cease trimming for up to 8 weeks. The rate is anywhere from 0.5 ounces to 1.1 ounces per m.
I would discuss your plans before spraying gly around a nice fencerow.