git diff files between commits code example

Example 1: git diff two commits

-> git diff 0da94be  59ff30c > my.patch
-> git apply my.patch

Example 2: git diff of a file between two commits

git diff <branch_hash> <other_branch_hash> -- <file_path>

Example 3: git diff two commits one file

$ git diff HEAD^^ HEAD main.c
$ # show diff between HEAD(current commit) and HEAD^^(two commits back) for main.c