使用git ls-remote -h -t git@git.com:xxx/xxx.git命令查看远程版本库，显示如下：
122624b5556fca0a78f5a206f121602f0c96ce4a refs/heads/master 12f2abe52d60c27eb36ab0ac43aa6612419e7d32 refs/tags/v2016-01-04_16-25-24 40265b9e6a65b915d5fd9d89e7a81abe5d17b4e1 refs/tags/v2016-01-04_16-25-24^{}最后的^{}是什么意思？能不能不显示呢？
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maybe help you:
http://stackoverflow.com/questions/15472107/when-listing-git-ls-remote-why-theres-after-the-tag-name
You can use git show to see the difference between the two
You can also use git show-ref to list logs without ^{}