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Created September 14, 2021 18:53
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  1. @wtbarnes wtbarnes created this gist Mar 5, 2020.
    59 changes: 59 additions & 0 deletions push-to-someone-elses-pr.md
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    # How to Push to Someone Else's Pull Request

    Let's say `contributor` has submitted a pull request to your (`author`) project (`repo`). They have made changes on their
    branch `feature` and have proposed to merge this into `origin/master`, where

    ```shell
    origin -> https://github.com/author/repo.git
    ```

    Now say you would like to make commits to their PR and push those changes. First, add their fork as a remote called
    `contributor`,

    ```shell
    > git remote add contributor https://github.com/contributor/repo.git
    ```

    such that,

    ```shell
    > git remote -v
    origin https://github.com/author/repo.git (fetch)
    origin https://github.com/author/repo.git (push)
    contributor https://github.com/contributor/repo.git (fetch)
    contributor https://github.com/contributor/repo.git (push)
    ```

    Next, pull down their list of branches,

    ```shell
    > git fetch contributor
    ```

    and create a new branch (`contributor-feature`) from the branch that they have created the PR from,

    ```shell
    > git checkout -b contributor-feature contributor/feature
    ```

    Now make any changes you need to make on this branch. If you'd like to rebase this PR on top of the master branch of
    the primary repository,

    ```shell
    > git rebase origin/master
    ```

    Finally, push the changes back up to the PR by pushing to their branch,

    ```shell
    git push contributor contributor-feature:feature
    ```

    Note that if you did a rebase, you'll need to add the `--force` (or `-f`) flag after `push`. The author of the PR
    also may need to explicitly allow you to push to their branch.

    ## Helpful Links

    * [Adding commits to someone else's pull request](https://tighten.co/blog/adding-commits-to-a-pull-request)
    * [Official GH Docs on pushing to a PR](https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/committing-changes-to-a-pull-request-branch-created-from-a-fork)
    * [How to Rebase a PR](https://github.com/edx/edx-platform/wiki/How-to-Rebase-a-Pull-Request)