git clone 某个分支或者所有分支

clone 某个分支：

git clone -b  dev5   https://git.coding.net/aiyongbao/tradepc.git

clone 所有分支：

git clone  https://git.coding.net/aiyongbao/tradepc.git

查看远程分支

git branch –r

创建本地分支18860127247 ，并自动关联远程分支 remotes/origin/18860127247

git checkout 18860127247

git clone默认会把远程仓库整个给clone下来; 
但只会在本地默认创建一个master分支
如果远程还有其他的分支，此时用git branch -a查看所有分支：

$ git branch -a
* master
  remotes/origin/13003829928
  remotes/origin/13067413633
  remotes/origin/13072807290
  remotes/origin/13080927420
  remotes/origin/13115923782
  remotes/origin/13144317201
  remotes/origin/13205029538
  remotes/origin/13227096136
  remotes/origin/13308329664
  remotes/origin/13330265124
  remotes/origin/13635286132
  remotes/origin/15009295272
  remotes/origin/15009295579
  remotes/origin/15080002570
  remotes/origin/15627361826
  remotes/origin/15809238075
  remotes/origin/15912074232
  remotes/origin/15980181313
  remotes/origin/15997295667
  remotes/origin/15997504012
  remotes/origin/17671742338
  remotes/origin/17683258868
  remotes/origin/17795835296
  remotes/origin/18150647681
  remotes/origin/18235352422
  remotes/origin/18606027794
  remotes/origin/18672963616
  remotes/origin/18860127247
  remotes/origin/18860127248
  remotes/origin/HEAD -> origin/master
  remotes/origin/linjiawei
  remotes/origin/master

能看到远程的所有的分支，如remotes/origin/python_mail.skin 
可以使用checkout命令来把远程分支取到本地，并自动建立tracking

1. $ git checkout -b python_mail.skin origin/python_mail.skin
2. Branch python_mail.skin set up to track remote branch python_mail.skin from origin
3. Switched to a new branch 'python_mail.skin'

或者使用-t参数，它默认会在本地建立一个和远程分支名字一样的分支

1. $ git checkout -t origin/python_mail.skin

windows下发现直接 git checkout 18860127247就可以自动创建本地分支，并关联, 如下：

$ git checkout 18860127247
Branch 18860127247 set up to track remote branch 18860127247 from origin.
Switched to a new branch '18860127247'

可用git help checkout 查看为啥

git checkout <branch>

To prepare for working on <branch>, switch to it by updating the index and the files in the working tree, and by pointing HEAD at the branch. Local modifications to the files in the working tree are kept, so that they can be committed to the <branch>.

If <branch> is not found but there does exist a tracking branch in exactly one remote (call it <remote>) with a matching name, treat as equivalent to

$ git checkout -b <branch> --track <remote>/<branch>

You could omit <branch>, in which case the command degenerates to "check out the current branch", which is a glorified no-op with a rather expensive side-effects to show only the tracking information, if exists, for the current branch.

因为本地没有这个branch，并且远程正好有一个branch匹配了这个名字（输入branch名字可用用tab自动补全），这样相当于输入了 git checkout -b <branch> --track <remote>/<branch>