submodule: try harder to fetch needed sha1 by direct fetching sha1

diff --git a/builtin/gc.c b/builtin/gc.c
index 42258fe3481dea642e85d8eb97ff175725420121..c583aad6ec2896c8a6ad3b35671e92a3c0478bcd 100644 (file)
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -233,7 +233,7 @@ static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
                return NULL;
 
        if (gethostname(my_host, sizeof(my_host)))
-               strcpy(my_host, "unknown");
+               xsnprintf(my_host, sizeof(my_host), "unknown");
 
        pidfile_path = git_pathdup("gc.pid");
        fd = hold_lock_file_for_update(&lock, pidfile_path,