Initialize utime with 0. It fixes a couple of compiler warnung:
    warning: 'utime.mtime_ns' may be used uninitialized in this function [-Wmaybe-uninitialized]
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 1ae04c4..820983c 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -4494,6 +4494,7 @@
 
     memset(&path, 0, sizeof(path));
     path.function_name = "utime";
+    memset(&utime, 0, sizeof(utime_t));
 #if UTIME_HAVE_FD
     path.allow_fd = 1;
 #endif