Penguins

git reflog shows 57adae7 [email protected]{2}: commit: relevant file. Checking out 57adae7 reveals a perhaps_relevant_v2 file with these contents:

YXMgeW9kYSBvbmNlIHRvbGQgbWUgInJld2FyZCB5b3UgaSBtdXN0IgphbmQgdGhlbiBoZSBnYXZlIG1lIHRoaXMgLS0tLQpyZ2JjdGZ7ZDRuZ2wxbmdfYzBtbTE3c180cjNfdU5mMHI3dW40NzN9

Base64 decoding produces the flag.

Flag: rgbctf{d4ngl1ng_c0mm17s_4r3_uNf0r7un473}