this script will read every line (file path) passed to it, then shows the last commit message and time (human readable period), you can use it to see who added png images and when to your project for example:
git ls-files | grep png | git-last-commit
you can get some results similar to the following:
images/screenshot.png
digitalcraftsman: Updated screenshots -- 3 years, 11 months ago
images/tn.png
digitalcraftsman: Updated screenshots -- 3 years, 11 months ago
static/images/avatar.png
digitalcraftsman: Added assets -- 4 years ago
static/images/[email protected]
digitalcraftsman: Added assets -- 4 years ago