Well,.they have come a ways in the ability to patch fiber. Depending on the tool, it can be accomplished in about 2 minutes per strand, in the field.
Although, when something like this happens, they do have to run a new fiber trunk to replace it as the patches take too much space and can cause strain on the fiber, whci will eventually cause a failure to occur.
When they do run a new trunk, the patch panel for the fiber, in the junction box, usually has enough capacity to carry the new trunk and allow them to switch to the new trunk pretty quickly without much downtime at all.
By the way, thanks for all the positive remarks and compliments. They are appreciated.