Obliterated Again

Description:

I realized that the previous command had a mistake. It should be right this time...?

$ git filter-branch --index-filter "git rm -f --ignore-unmatch *flag" --prune-empty -- --all
$ git reflog expire --expire=now --all
$ git gc --aggressive --prune=now

Using git log and git show didn't find anything

I google about "git restore after git filter-branch", I found something in this link

After running git reset --hard refs/original/refs/heads/master command, we get the flag back!

root@2Real:~/Downloads/TSGCTF/Obliterated_again/easy_web# git reset --hard refs/original/refs/heads/master
HEAD is now at 1c80e25 enable production mode
root@2Real:~/Downloads/TSGCTF/Obliterated_again/easy_web# ls
problem  README.md
root@2Real:~/Downloads/TSGCTF/Obliterated_again/easy_web# cd problem/
root@2Real:~/Downloads/TSGCTF/Obliterated_again/easy_web/problem# ls
data.db  flag  lib  main.cr  README.md  shard.lock  shard.yml  src

Using the same script:

import zlib
f = open('easy_web/problem/flag')
print zlib.decompress(f.read())

Flag

TSGCTF{$git_update-ref-d_refs/original/refs/heads/master_S0rry_f0r_m4king_4_m1st4k3_0n_th1s_pr0bl3m}