Configure Git to sync your fork with the original 同步 Github fork 出来的分支

https://help.github.com/articles/fork-a-repo/ 

https://help.github.com/articles/syncing-a-fork/

Configure Git to sync your fork with the original Spoon-Knife repository

When you fork a project in order to propose changes to the original repository, you can configure Git to pull changes from the original, or upstream, repository into the local clone of your fork.

1. On GitHub, navigate to the octocat/Spoon-Knife repository.

2. Under your repository name, click Clone or download.

3. In the Clone with HTTPs section, click  to copy the clone URL for the repository.

4. Open Git Bash.

5. Change directories to the location of the fork you cloned in Step 2: Create a local clone of your fork.

   • To go to your home directory, type just cd with no other text.
   • To list the files and folders in your current directory, type ls.
   • To go into one of your listed directories, type cd your_listed_directory.
   • To go up one directory, type cd ...

6. Type git remote -v and press Enter. You'll see the current configured remote repository for your fork.

   git remote -vorigin  https://github.com/YOUR_USERNAME/YOUR_FORK.git (fetch)origin  https://github.com/YOUR_USERNAME/YOUR_FORK.git (push)

7. Type git remote add upstream, and then paste the URL you copied in Step 2 and press Enter. It will look like this:

   git remote add upstream https://github.com/octocat/Spoon-Knife.git

8. To verify the new upstream repository you've specified for your fork, type git remote -v again. You should see the URL for your fork as origin, and the URL for the original repository as upstream.

   git remote -vorigin    https://github.com/YOUR_USERNAME/YOUR_FORK.git (fetch)origin    https://github.com/YOUR_USERNAME/YOUR_FORK.git (push)upstream  https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY.git (fetch)upstream  https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY.git (push)

Now, you can keep your fork synced with the upstream repository with a few Git commands. For more information, see "Syncing a fork."

Syncing a fork

• MAC
• WINDOWS
• LINUX

Sync a fork of a repository to keep it up-to-date with the upstream repository.

Before you can sync your fork with an upstream repository, you must configure a remote that points to the upstream repository in Git.

1. Open Git Bash.

2. Change the current working directory to your local project.

3. Fetch the branches and their respective commits from the upstream repository. Commits to master will be stored in a local branch, upstream/master.

   git fetch upstreamremote: Counting objects: 75, done.remote: Compressing objects: 100% (53/53), done.remote: Total 62 (delta 27), reused 44 (delta 9)Unpacking objects: 100% (62/62), done.From https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY * [new branch]      master     -> upstream/master

4. Check out your fork's local master branch.

   git checkout masterSwitched to branch 'master'

5. Merge the changes from upstream/master into your local master branch. This brings your fork's master branch into sync with the upstream repository, without losing your local changes.

   git merge upstream/masterUpdating a422352..5fdff0fFast-forward README                    |    9 ------- README.md                 |    7 ++++++ 2 files changed, 7 insertions(+), 9 deletions(-) delete mode 100644 README create mode 100644 README.md

   If your local branch didn't have any unique commits, Git will instead perform a "fast-forward":

   git merge upstream/masterUpdating 34e91da..16c56adFast-forward README.md                 |    5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)