git blame (find changes in log)

By Xah Lee. Date: 2022-11-16. Last updated: 2023-04-26.

Find When is a File Added

git log --diff-filter=A -- filename

Find When is a Line Added to a File?

git blame filename: Show which commit and author last modified each line of a file.

git log -S searchString filename: search for a change.
git log -G regex filename: search for a change by regex.

See git help blame and git help log.