Add how-to on using update-hook.

diff --git a/pull.h b/pull.h
index e173ae3337c4465da87d849f4e5c9da203fdf01d..e7710e89e710979283f82fe3e67ca1296e70b556 100644 (file)
--- a/pull.h
+++ b/pull.h
@@ -8,6 +8,13 @@
  */
 extern int fetch(unsigned char *sha1);
 
+/*
+ * Fetch the specified object and store it locally; fetch() will be
+ * called later to determine success. To be provided by the particular
+ * implementation.
+ */
+extern void prefetch(unsigned char *sha1);
+
 /*
  * Fetch ref (relative to $GIT_DIR/refs) from the remote, and store
  * the 20-byte SHA1 in sha1.  Return 0 on success, -1 on failure.  To