Optional: When landing your own commits, force push the amended commit to the
branch you used to open the pull request. If your branch is called `bugfix`,
then the command would be `git push --force-with-lease origin master:bugfix`.
When the pull request is closed, this will cause the pull request to
show the purple merged status rather than the red closed status that is
usually used for pull requests that weren't merged.
from the collab guide: