[PATCH] Generic support for pulling refs

This adds support to pull.c for requesting a reference and writing it to a
file. All of the git-*-pull programs get stubs for now.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>

http-pull.c

@@ -92,6 +92,11 @@ int fetch(unsigned char *sha1)
 	return 0;
 }
 
+int fetch_ref(char *ref, unsigned char *sha1)
+{
+	return -1;
+}
+
 int main(int argc, char **argv)
 {
 	char *commit_id;