-M[<n>], --find-renames[=<n>]
Detect renames. If n is specified, it is a threshold on the similarity index
(i.e. amount of addition/deletions compared to the file’s size). For example,
-M90% means git should consider a delete/add pair to be a rename if more than
90% of the file hasn’t changed.
warning: inexact rename detection was skipped due to too many files.
warning: you may want to set your diff.renameLimit variable to at least 450 and retry the command.