以windows為例

從fork專案開始

登入自己的github賬號，fork一個專案，這裡以 sharding-sphere 為例（順便打一下廣告^_^畢竟參與了專案）
1、登入github，開啟專案主頁sharding-sphere
2、點選頁面的fork
3、fork完成可以在自己的github倉庫中看到fork的專案sharding-sphere

clone專案到本地

1、git客戶端選擇
根據個人喜好，選擇git shell或者純桌面版git desktop。安裝過程略，附下載地址 地址1、地址2、地址3

如果裝的是純桌面版，可以通過選單開啟git下載安裝嚮導(省的搜尋……)

2、在本地建立倉庫存放的位置
本案例在d:\GitHub
3、克隆fork的專案到本地倉庫
開啟git shell

C:\Users\yueling>cd D:\GitHub
D:\GitHub>git clone https://github.com/yue530tom/sharding-sphere.git

Cloning into 'sharding-sphere'...
remote: Counting objects: 87775, done.
remote: Total 87775 (delta 0), reused 0 (delta 0), pack-reused 87775
 

Receiving objects: 100% (87775/87775), 16.87 MiB | 63.00 KiB/s, done.
Resolving deltas: 100% (42095/42095), done.                        ˻

檢視clone專案

D:\GitHub> ls

目錄: D:\GitHub

Mode                LastWriteTime     Length Name
----                -------------     ------ ----
d----          2018/5/7     11:27
 
            moco
d----         2018/5/11     12:08            sharding-sphere
d----          2018/5/9     18:01            shardingProxyPerf

同步更新到fork

1、新增新的遠端倉庫地址
檢視你fork的遠端倉庫的地址

D:\GitHub> cd .\sharding-sphere
D:\GitHub\sharding-sphere [dev ≡]> git remote -v
origin  https://github.com/yue530tom/sharding-sphere.git (fetch)
origin  https://github.com/yue530tom/sharding-sphere.git (push)
sharding-sphere https://github.com/sharding-sphere/sharding-sphere.git (fetch)
sharding-sphere https://github.com/sharding-sphere/sharding-sphere.git (push)
D:\GitHub\sharding-sphere [dev ≡]> 

這裡已經有專案的源地址了：sharding-sphere，如果沒有，可以通過

git remote add 遠端倉庫別名 https://github.com/sharding-sphere/sharding-sphere.git 

來新增一個(倉庫的別名，可以使用任何合法的名稱，但建議用有標識意義的名稱)
如：可以再新增一個別名為src的遠端倉庫

D:\GitHub\sharding-sphere [dev ≡]> git remote add src https://github.com/sharding-sphere/sharding-sphere.git
D:\GitHub\sharding-sphere [dev ≡]> git remote -v
origin  https://github.com/yue530tom/sharding-sphere.git (fetch)
origin  https://github.com/yue530tom/sharding-sphere.git (push)
sharding-sphere https://github.com/sharding-sphere/sharding-sphere.git (fetch)
sharding-sphere https://github.com/sharding-sphere/sharding-sphere.git (push)
src     https://github.com/sharding-sphere/sharding-sphere.git (fetch)
src     https://github.com/sharding-sphere/sharding-sphere.git (push)
D:\GitHub\sharding-sphere [dev ≡]>                                                                                    

2、同步更新
當原專案有更新的時候，將更新檢入到本地。

開啟git命令列工具並進入專案本地路徑

D:\GitHub\sharding-sphere [dev ≡]>

執行git fetch src命令，檢出src分支以及各自的更新

D:\GitHub\sharding-sphere [dev ≡]> git fetch src
remote: Counting objects: 4962, done.
remote: Compressing objects: 100% (611/611), done.
remote: Total 4962 (delta 2488), reused 3099 (delta 2431), pack-reused 1776
Receiving objects: 100% (4962/4962), 1.04 MiB | 209.00 KiB/s, done.
Resolving deltas: 100% (2845/2845), completed with 388 local objects.
From https://github.com/sharding-sphere/sharding-sphere
 * [new branch]          dev              -> src/dev
 * [new branch]          master           -> src/master
 * [new branch]          sharding-console -> src/sharding-console
D:\GitHub\sharding-sphere [dev ≡]>

切換到你的本地分支

D:\GitHub\sharding-sphere [dev ≡]> git checkout dev
Already on 'dev'
Your branch is up-to-date with 'origin/dev'.
D:\GitHub\sharding-sphere [dev ≡]>

合併src/dev分支和dev分支

D:\GitHub\sharding-sphere [dev ≡]>git merge src/dev
……
 rename {sharding-jdbc-core => sharding-jdbc}/src/test/resources/integrate/dataset/sharding/tbl/expect/update/tbl_9.xml (100%)
 rename {sharding-jdbc-core => sharding-jdbc}/src/test/resources/integrate/dataset/sharding/tbl/init/tbl.xml (100%)
 create mode 100644 sharding-jdbc/src/test/resources/integrate/dbtest/db/data-init.xml
 create mode 100644 sharding-jdbc/src/test/resources/integrate/dbtest/db/schema.xml
 create mode 100644 sharding-jdbc/src/test/resources/integrate/dbtest/db/sharding-rule.yaml
 create mode 100644 sharding-jdbc/src/test/resources/integrate/dbtest/dbtbl/data-init.xml
 create mode 100644 sharding-jdbc/src/test/resources/integrate/dbtest/dbtbl/schema.xml 
 ……    
D:\GitHub\sharding-sphere [dev ↑235]>                                       

將原專案中的更改更新到本地分支，這樣就能使你的本地的fork分支與原專案保持同步

可以用git pull命令代替上面操作。作用：取回遠端主機某個分支的更新，再與本地的指定分支合併
git pull [options] [ […]]

執行git push將本地分支的修改推送到遠端fork的專案

D:\GitHub\sharding-sphere [dev ↑235]> git push
Counting objects: 4963, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (1915/1915), done.
Writing objects: 100% (4963/4963), 1.17 MiB | 113.00 KiB/s, done.
Total 4963 (delta 2592), reused 4568 (delta 2455)
remote: Resolving deltas: 100% (2592/2592), completed with 62 local objects.
To https://github.com/yue530tom/sharding-sphere.git
   5ff9b0417..37cde1fee  dev -> dev
D:\GitHub\sharding-sphere [dev ≡]> git checkout dev
Already on 'dev'
Your branch is up-to-date with 'origin/dev'.
D:\GitHub\sharding-sphere [dev ≡]>

登入github確認是否已經更新了

git（非純桌面版）的sync也可以實現專案的同步
選擇需要比較的分支，選擇配置的源倉庫對應的分支，這點很重要比如選擇src（上面已經用到過）