Ævar Arnfjörð Bjarmason [off-list ref] writes:
$ git reset --mixed t/Makefile
warning: --mixed option is deprecated with paths.
Unstaged changes after reset:
M t/Makefile
So what should I use instead? 0e5a7faa which introduced it doesn't say.
You should say nothing. "git reset [<commit>] <path>" is about resetting
the index entry selectively, and there is no room for any mode to be
involved (iow "git reset --soft t/Makefile" does not make any sense),
hence deprecation.