Cannot Run Git Command

I try to run Git command but error and show this message :

Warning: Identity file /home/mydomain.com/.ssh/testi2801 not accessible: No such file or directory.
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

I run Git command outside mydomain.com, and I already deleted the domain before, can anyone help me?