I don't think a court is going to understand git revisions. I also don't think a person reverting to timepoint 1 with license A changes the fact that they received it at time point 2 offered under license B.

At best the license.txt that accompanies a particular revision can serve as a sign post of what license applies it is not dispositive and if the sign post is wrong it was your bad for failing to understand what license applied before distributing.