-#include <ctype.h>
 #include "cache.h"
 
 static void flush_current_id(int patchlen, unsigned char *id, SHA_CTX *c)
 
                if (!memcmp(line, "diff-tree ", 10))
                        p += 10;
+               else if (!memcmp(line, "commit ", 7))
+                       p += 7;
 
                if (!get_sha1_hex(p, n)) {
                        flush_current_id(patchlen, sha1, &ctx);
-                       memcpy(sha1, n, 20);
+                       hashcpy(sha1, n);
                        patchlen = 0;
                        continue;
                }
                if (!patchlen && memcmp(line, "diff ", 5))
                        continue;
 
+               /* Ignore git-diff index header */
+               if (!memcmp(line, "index ", 6))
+                       continue;
+
                /* Ignore line numbers when computing the SHA1 of the patch */
                if (!memcmp(line, "@@ -", 4))
                        continue;
 
        generate_id_list();
        return 0;
-}      
+}