https://blog.dasomoli.org/git-git-branch%ec%9d%98-%ec%b6%9c%eb%a0%a5%ec%9d%b4-less%ec%b2%98%eb%9f%bc-%eb%82%98%ec%98%a4%eb%8a%94%ea%b1%b0-%eb%81%84%ea%b8%b0/