Stuck at Moving through time level - (branches section)

[vuld0]

I am stuck at moving through time level. The challenge seems unclear to me. It says that we have to git checkout at a commit and edit the files. Though, I have completed, but the challenge doesn't complete.

[tunafishman]

just get the state of the piggy bank and the little sister's coin counts back to what it was.

[Matias-Ramos]

Checkout to last branch. Modify piggy bank so it has 10 coins again and commit. Yeah, the prompt is a bit unclear.