When executing the checkout command in GIT, it displays an error, what's wrong?

Question

git

1) Run Git init in the middle of my project
2) Check files Git status
3) Run Git add .
4) I checked all the files were green Git status
5) I did not make the layout correctly.
6) I checked that Git status has changed where
7) Almost all files have a change and now when executing the Git checkout command, it displays such garbage fatal: You are on a branch yet to be born what to do?

Answer 1

and what does the command `git branch -a` show you?

Answer 2

Checkout does not allow to do if files that change during checkout are changed and not committed. You need to commit or remove changes to files if they are not needed.