Create patch or diff file from git repository and apply it to another different git repository

Question

I work on WordPress based project and I want to patch my project at each new release version of WP. For this, I want generate a patch between two commits or tags.

For

Answer 1

You can just use git diff to produce a unified diff suitable for git apply:

git diff tag1..tag2 > mypatch.patch

You can then apply the resulting patch with:

git apply mypatch.patch