git - 在有和没有分支起点的情况下使用 `git checkout -b`

Question

我是 Git 的新手，我想知道两个命令之间的区别。

`git checkout -b <branch-name>`
`git checkout -b <branch-name> origin/master`

如果我执行第一条命令，Git 是如何创建分支的？分支是从本地主机还是远程主机创建的？

Answer 1

如果您未指定起点，则新分支将从您当前 checkout 的内容(当前 HEAD)创建。

git-checkout :

git checkout -b|-B <new_branch> [<start point>]

Specifying -b causes a new branch to be created as if git-branch(1) were called and then checked out.

和 git-branch :

[...] The command’s second form creates a new branch head named <branchname> which points to the current HEAD, or <start-point> if given.