git detached HEAD explained-优快云博客

本文深入探讨了Git中HEAD指针的概念及其工作原理，并通过实际操作示例帮助读者理解如何在不同提交间切换。

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Git has something called a 'detached HEAD' that bears some explanation. Youare told 'do not commit on a detached HEAD', and it is not always clear whator why this is.

开始主要讲git的原理，讲HEAD指针。

反正，最重要的东西在最后：

git reflog show HEAD@{now} -10

dcd215b... HEAD@{5 minutes ago}: commit (amend): 0-terminology: the malloc analogy added, plus
5ce8bfe... HEAD@{11 minutes ago}: commit: 0-terminology: the malloc analogy added, plus
3d93420... HEAD@{11 minutes ago}: rebase -i (pick): updating HEAD
7fdae94... HEAD@{11 minutes ago}: checkout: moving from master to 7fdae94815d6c676742c9984132b7b9e71a57f98
3d93420... HEAD@{13 minutes ago}: rebase -i (squash): updating HEAD
c55900c... HEAD@{13 minutes ago}: rebase -i (pick): updating HEAD
7fdae94... HEAD@{13 minutes ago}: checkout: moving from master to 7fdae94815d6c676742c9984132b7b9e71a57f98
e9955c8... HEAD@{14 minutes ago}: commit: s
97ab644... HEAD@{20 minutes ago}: commit: autogen
c55900c... HEAD@{23 minutes ago}: commit (amend): 0-terminology: the malloc analogy added, plus

Now you look at this, decide which one you want, and grab it:

git branch thank_God_its_safe 7fdae94
# like 'thank_God_its_safe = 0x7fdae94815d6c676742c9984132b7b9e71a57f98'
git checkout thank_God_its_safe

from:http://blog.youkuaiyun.com/raining_heart/article/details/8569904