whtsky's wiki

git update-index --assume-unchanged <path>
git ls-files -v|grep '^h' # list assume unchanged files
git update-index --no-assume-unchanged <path>

Add alias to `~/.gitconfig`:

[alias]
    hide = update-index --assume-unchanged
    unhide = update-index --no-assume-unchanged

git hide path
git unhide path

Source: https://stackoverflow.com/questions/17195861/undo-git-update-index-assume-unchanged-file