extern void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname);
+/*
+ * Add a reference to the in-memory packed reference cache. To actually
+ * write the reference to the packed-refs file, call pack_refs().
+ */
+extern void add_packed_ref(const char *refname, const unsigned char *sha1);
+
/*
* Extra refs will be listed by for_each_ref() before any actual refs
* for the duration of this process or until clear_extra_refs() is