Review a merge commit - how did the destination branch change?

After merging feature into master , answer the following questions.

What files did feature modify? Look at the difference between master and the first parent of master (which in this case is the previous master ). Those differences will show what files the merge in of feature changed.

git checkout master
git diff --name-only head^1..head --diff-filter=M

What files did feature delete?

git checkout master
git diff --name-only head^1..head --diff-filter=D