+int fetch_ref(char *ref, unsigned char *sha1)
+{
+ signed char remote;
+ char type = 'r';
+ write(fd_out, &type, 1);
+ write(fd_out, ref, strlen(ref) + 1);
+ read(fd_in, &remote, 1);
+ if (remote < 0)
+ return remote;
+ read(fd_in, sha1, 20);
+ return 0;
+}
+