*特定の時点
$ git reset --hard 昔のコミットのハッシュ値
<blockquote>
*リモートにpush済みの場合、再度pushするとエラーになる
<pre>
hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Integrate the remote changes (e.g.
hint: 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.
</pre>
</blockquote>
=====resetの後最新の状態に戻す=====