Re: [PATCH v3 3/6] commit: add a reword suboption to --fixup

`git commit --fixup=reword:<commit>` creates an empty "amend!" commit
that will reword <commit> without changing its contents when it is
rebased with --autosquash.

Apart from ignoring staged changes it works similarly to
`--fixup=amend:<commit>`.

Signed-off-by: Charvi Mendiratta <redacted>
---

diff --git a/builtin/commit.c b/builtin/commit.c

@@ -1186,6 +1186,27 @@ static void finalize_deferred_config(struct wt_status *s)
+static void check_fixup_reword_options(int argc, const char *argv[]) {
+       if (whence != FROM_COMMIT) {
+               if (whence == FROM_MERGE)
+                       die(_("You are in the middle of a merge -- cannot reword."));
+               else if (is_from_cherry_pick(whence))
+                       die(_("You are in the middle of a cherry-pick -- cannot reword."));
+       }
+       if (argc)
+               die(_("cannot combine reword option of --fixup with path %s"), *argv);
+       if (patch_interactive)
+               die(_("cannot combine reword option of --fixup with --patch"));
+       if (interactive)
+               die(_("cannot combine reword option of --fixup with --interactive"));
+       if (all)
+               die(_("cannot combine reword option of --fixup with --all"));
+       if (also)
+               die(_("cannot combine reword option of --fixup with --include"));
+       if (only)
+               die(_("cannot combine reword option of --fixup with --only"));
+}