If she understands 'here' or 'come' and then reward. Another way (which I always use and it works is umbilical cord training or leash training if dog is too strong). Like someone said here, have someone walk by the fence. If she responds to come ensure that you have the leash to draw her to you. Then reward.
Someone walks by the fence, use the word here or come. If she does reward, if not correct the behaviour. Immediately use here and reward.
Claiming the fence may be futile since the dog is already in a different state of mind and the dog will work it's way around you. Not having contact (by leash) and then reward - you will be trying to get the attention and it may not work.