If just want to see the file names where commit
b is chronologically after
git diff <a commit sha1>...<b commit sha2> --name-only # b is after a in time
If you want to see all the file names and what was changed from commit a to commit b then drop the last argument.
git diff <a commit sha1>...<b commit sha2> # shows file names and what changed in each file
An example of
<commit sha1> are the commit id's like
675ee6860d2c273bcc6c6a0536634a107e2a3d9f. Generally the first 8-10 digits will work on most projects, but may need more if the project has oodles of commits. Typically I use the output of the id from
git log --oneline.
When you get a difference of a...b and b is later than a in time it's easy to see what was changed in each file chronologically.