Diff command is not identifying moves and/or renames

[russell fleming]

Example: git diff --name-status --find-renames

At the bash command line performing a diff of two branches is not identifying moves or renames of files. Using Tortoise for Git can do the same compare and see this information in the output. What are the arguments to get the command line to do the same?

Additional info

I don't care if git diff flags a rename as separate D and A statuses or returns an R status showing old name/new name like Tortoise.