git - HEAD@{n} 在 git reflog 的输出中意味着什么？

Question

HEAD@{0} 和 HEAD@{1} 是什么意思？ HEAD 不应该是指向单个提交的标记吗？那为什么两者都显示呢？

git reflog
97df263 HEAD@{0}: commit: I just made my first change to this file. Yay!
4333289 HEAD@{1}: clone: from https://github.com/tswicegood/mysite

Answer 1

HEAD@{1} 是旧的 HEAD，HEAD@{2} 是之前的 HEAD，依此类推。

例子:

$ git reflog
abcdefg HEAD@{0}: Initial commit.

$ git commit -m "Add new function."
[master ab123cd] Add new function.
 1 file changed, 15 insertions(+), 2 deletions(-)

$ git reflog
ab123cd HEAD@{0}: Add new function.
abcdefg HEAD@{1}: Initial commit.