为什么git cherry-pick会创建一个不同的校验和？

Question

在下面的会话中,为什么结果git cherry-pick与复制的提交没有相同的校验和？它具有相同的注释,作者,日期和父级.校验和中我还没有考虑到什么？

谢谢.

~$  mkdir tmp
~$ cd tmp/
~/tmp$ git init
Initialized empty Git repository in /home/sinclairs/projects/tmp/.git/

~/tmp$ echo "asdf" >asdf
~/tmp$ git add asdf
~/tmp$ git commit -m asdf
[master (root-commit) 7d0aaa3] asdf
 1 files changed, 1 insertions(+), 0 deletions(-)
 create mode 100644 asdf

~/tmp$ echo "fdsa" >asdf
~/tmp$ git commit -a -m asdf2
[master b392367] asdf2
 1 files changed, 1 insertions(+), 1 deletions(-)

~/tmp$ git log --format=oneline
b3923677106db9371faf55ed2cb8c7d06f586f7f asdf2
7d0aaa3937de390b7a119c73dbf9428126c1bac5 asdf

~/tmp$ git checkout -b mybranch HEAD^
Switched to a new branch 'mybranch'

~/tmp$ git cherry-pick master
Finished one cherry-pick.
[mybranch ca92f66] asdf2
 1 files changed, 1 insertions(+), 1 deletions(-)

~/tmp$ git log --format=oneline
ca92f666cc53715c6b5ae2975b938275e0d20f73 asdf2
7d0aaa3937de390b7a119c73dbf9428126c1bac5 asdf

Answer 1

从文档:

git cherry-pick master
    Apply the change introduced by the commit at the tip of the master branch and create a new commit with this change.

新的提交日期不同.