Getting myself out of a sticky jujutsu situation

So I managed to get myself into a sticky situation with JJ where I had squashed together a whole bunch of crappy commits with the intention of then taking the large one and cutting it apart. So I squashed, rebased, then started cutting it apart... only to realize that I had goofed a bit on my squash and included an experimental change I didn’t want to be part of the original commit. So now what. I…