how to add same file with changed date modified

Hi Friends,

 can you please tell how to add same file which was already there. In my case actually bitbucket file and new git file are appearing same because they are secured so when i try to push it does not get recognized. How to add this file? I have tried all option git add -a or -u, nothing happened.

one file is xml and another is binary so sourcetree or git bash detects only one, it does not detect attribute file. Why so please let me know. Thanks.

can anyone please reply how to add tracked file too?

how to add tracked file to sourcetree which is same based on modified date?