'git pull'和'git fetch'有什么区别？

问题：

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What are the differences between git pull and git fetch ? git pull和git fetch什么区别？

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解决方案：

参考一： https://stackoom.com/question/1E3R/git-pull-和-git-fetch-有什么区别
参考二： https://oldbug.net/q/1E3R/What-is-the-difference-between-git-pull-and-git-fetch