Clicking on the link
We will find the hint is git
We get .git , but we cannot find the flag , of courese , on the link , we will find another hint——————years，we also know the git head，so I use this command：
```java

$ git reset --hard HEAD^

```
OK，find the flag.

Original writeup (https://github.com/Veneno0/CTFwp/tree/master/Internetwache-CTF-2016/Web80).