这个例子可能对某人有帮助：

注意“ origin”是我的远程“Github 上的内容”的别名
注意“ mybranch”是我正在与 github 同步的分支“本​​地内容”的别名
——如果你没有创建，你的分支名称是 ‘master’一。但是，我使用不同的名称mybranch来显示使用分支名称参数的位置。

我在 github 上的远程仓库到底是什么？

$ git remote -v
origin  https://github.com/flipmcf/Playground.git (fetch)
origin  https://github.com/flipmcf/Playground.git (push)

添加“相同代码的其他 github 存储库”——我们称之为 fork：

$ git remote add someOtherRepo https://github.com/otherUser/Playground.git

$git remote -v
origin  https://github.com/flipmcf/Playground.git (fetch)
origin  https://github.com/flipmcf/Playground.git (push)
someOtherRepo https://github.com/otherUser/Playground.git (push)
someOtherRepo https://github.com/otherUser/Playground.git (fetch)

确保我们的本地仓库是最新的：

$ git fetch

在本地更改一些内容。假设文件 ./foo/bar.py

$ git status
# On branch mybranch
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#   modified:   foo/bar.py

查看我未提交的更改

$ git diff mybranch
diff --git a/playground/foo/bar.py b/playground/foo/bar.py
index b4fb1be..516323b 100655
--- a/playground/foo/bar.py
+++ b/playground/foo/bar.py
@@ -1,27 +1,29 @@
- This line is wrong
+ This line is fixed now - yea!
+ And I added this line too.

在本地提交。

$ git commit foo/bar.py -m"I changed stuff"
[myfork 9f31ff7] I changed stuff
1 files changed, 2 insertions(+), 1 deletions(-)

现在，我和我的遥控器不同（在 github 上）

$ git status
# On branch mybranch
# Your branch is ahead of 'origin/mybranch' by 1 commit.
#
nothing to commit (working directory clean)

与远程区别 - 你的叉子：（这经常用git diff master origin）

$ git diff mybranch origin
diff --git a/playground/foo/bar.py b/playground/foo/bar.py
index 516323b..b4fb1be 100655
--- a/playground/foo/bar.py
+++ b/playground/foo/bar.py
@@ -1,27 +1,29 @@
- This line is wrong
+ This line is fixed now - yea!
+ And I added this line too.

（git push 将这些应用到远程）

我的远程分支与远程主分支有何不同？

$ git diff origin/mybranch origin/master

我的本地内容与远程 master 分支有何不同？

$ git diff origin/master

我的东西与其他人的 fork，同一个 repo 的 master 分支有何不同？

$git diff mybranch someOtherRepo/master