This quick overview will cover how to compare changes between commits or any commit in git log history.

Compare from the last commit:

git diff HEAD^ HEAD

Or alternatively, use commit IDs

git diff 0594b24 3851af3 

Or using alias

git diff @^ @

Comparison by default compares to the HEAD you can further rewrite to

git diff HEAD^
git diff 0594b24
git diff @^

or simply use which compares to the last commit.

git show