NetBeans 8.2, how to reset/update version control files for a project?

Question

NetBeans

Worked in NetBeans 8.2, the system crashed. Reboot. I go back to NetBeans and see that when a file is changed, the "-A" flag does not appear next to its name in the tab + the name is not highlighted.
Previously, the title was highlighted, informing that changes were made to the file but not saved. How can this be restored? can anyone come across?
It means here, when changing, the font became bold, as on the screen + the color changed and after the extension there was the "-A" flag.

Here's another error when copying files from a folder to a folder on the project:

As I understand it, the files responsible for version control for the project have been damaged, how can they be reset / updated?

Answer 1

In general, I did not find anything better than to demolish the .git folder and initialize the repository for the new project again. Generally helped