How can you find out which commit was used in a cherry-pick operation? git reflog only seems to show the resulting commit Sha-1 after the cherry-pick is merged and commited. We need to find the original commit prior to that.
Why? It's because we mistakenly cherry-picked a large, but incorrect commit to a different branch. But noone realized it until after modifying it so that it compiles plus added other commits after it.
The goal here is to compare this resulting cherry-pick from the original one and use those differences either as a patch or to manually make the same changes to the correct cherry-pick.
You can compare the git log -p output. You may be able to do it with --stat as well.