Well that's basically it. You can even change and allocate new musicdefs!
Step 1. Fetch and check out the branch for this merge request
git fetch origin git checkout -b musicdef-lua origin/musicdef-lua
Step 2. Review the changes locally
Step 3. Merge the branch and fix any conflicts that come up
git checkout next git merge --no-ff musicdef-lua
Step 4. Push the result of the merge to GitLab
git push origin next
Note that pushing to GitLab requires write access to this repository.
Tip: You can also checkout merge requests locally by following these guidelines.