git diff between two commits for a file 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