git-fetch--tool: start rewriting parts of git-fetch in C.

Signed-off-by: Junio C Hamano <junkio@cox.net>

git.c

@@ -242,6 +242,7 @@ static void handle_internal_command(int argc, const char **argv, char **envp)
 		{ "diff-index", cmd_diff_index, RUN_SETUP },
 		{ "diff-stages", cmd_diff_stages, RUN_SETUP },
 		{ "diff-tree", cmd_diff_tree, RUN_SETUP },
+		{ "fetch--tool", cmd_fetch__tool, RUN_SETUP },
 		{ "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
 		{ "for-each-ref", cmd_for_each_ref, RUN_SETUP },
 		{ "format-patch", cmd_format_patch, RUN_SETUP },