Copy: Avoid extra dispatch in type-mismatch case (#68950)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/68950
Test Plan: Imported from OSS
Reviewed By: albanD
Differential Revision: D33064447
Pulled By: anjali411
fbshipit-source-id: 82bf4e144c1e629e30226eedc9d26ca63cfb4431
