Git - 포크한 깃허브 저장소를 원본 저장소와 동기화 하기

* 원본 저장소의 변경 내용을 포크(fork)한 제 저장소에 반영할 때 사용.

1. 로컬로 포크 저장소를 clone 합니다.
2. 로컬에 있는 포크 저장소에 리모트를 설정해 줍니다.
3. 포크 저장소에 원본 저장소를 머지합니다.

• 원본 저장소 => https://github.com/ax5ui/ax5ui-kernel
• 포크 저장소 => https://github.com/hyunjun19/ax5ui-kernel.git

// 포크 저장소를 로컬로 클론
$ git clone https://github.com/hyunjun19/ax5ui-kernel.git

// 로컬 저장소로 이동
$ cd ax5ui-kernel

// 현재 설정된 리모트 저장소 조회
$ git remote -v
origin	https://github.com/hyunjun19/ax5ui-kernel.git (fetch)
origin	https://github.com/hyunjun19/ax5ui-kernel.git (push)

// 리모트 저장소 추가
$ git remote add upstream https://github.com/ax5ui/ax5ui-kernel

// 리모트 저장소 확인
$ git remote -v
origin	https://github.com/hyunjun19/ax5ui-kernel.git (fetch)
origin	https://github.com/hyunjun19/ax5ui-kernel.git (push)
upstream	https://github.com/ax5ui/ax5ui-kernel (fetch)
upstream	https://github.com/ax5ui/ax5ui-kernel (push)

// 리모트 저장소 fetch
$ git fetch upstream
remote: Counting objects: 793, done.
remote: Total 793 (delta 692), reused 692 (delta 692), pack-reused 101
Receiving objects: 100% (793/793), 215.62 KiB | 144.00 KiB/s, done.
Resolving deltas: 100% (717/717), completed with 127 local objects.
From https://github.com/ax5ui/ax5ui-kernel
...

// 리모트 저장소 merge
$ git merge upstream/master
Updating 9cdedc67..92c52dab
Fast-forward
...

// 포크 저장소로 push
$ git push
Counting objects: 791, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (141/141), done.
Writing objects: 100% (791/791), 212.18 KiB | 53.05 MiB/s, done.
Total 791 (delta 710), reused 723 (delta 650)
remote: Resolving deltas: 100% (710/710), completed with 99 local objects.
To https://github.com/hyunjun19/ax5ui-kernel.git
   9cdedc67..92c52dab  master -> master

Reference : hyunjun19.github.io/2018/03/09/github-fork-syncing/