Permanently reset subdirectory to specific past state

Question

In a git repository I have a subdirectory that I want to reset to a specific state in the past (an earlier commit). Is it possible to undo all commits on files in a specific

Answer 1

The simplest way to do it to use the ability of git checkout to be applied on a subdirectory. Then stage and commit:

git checkout  -- path/to/subdir
git add -A path/to/subdir
git commit -m "reverted files in path/to/subdir to what it was at "