Need to undo a code change? You could revert. Or, you could apply the patch without creating a commit. That's what I want to do much of the time.
Use git apply with the -R (reverse) flag:
git show 8cc13b1 | git apply -R
All the changes from 8cc13b1 get applied to your working directory. In a large commit,
do this tactically by limiting to just one file or directory.
git show 8cc13b1 src/fileToRevert.ts | git apply -R