How does git ignore new or changed code and not submit it?

There is an urgent bug that needs to be fixed during development, and half of the other code under development has been written. How can I solve this part of the code if I don’t want to submit it?

Hidden method

1. "Hide" the code, separate out a change_list, right-click on any file in the project, and select stash changes
   
2. Create after setting a name
   
3. At this time, this part of the change is hidden, cannot be seen, and cannot be submitted.
   

Recovery method

1. Select unStash changes
   
2. Select your saved changes
   
3. You can restore it after agreeing