1 files changed, 15 insertions, 2 deletions

diff --git a/ui-log.c b/ui-log.c
index 00ecd4e..2f90778 100644
--- a/ui-log.c
+++ b/ui-log.c
@@ -78,18 +78,31 @@ void print_commit(struct commit *commit)
         cgit_free_commitinfo(info);
 }
 
+static const char *disambiguate_ref(const char *ref)
+{
+        unsigned char sha1[20];
+        const char *longref;
+
+        longref = fmt("refs/heads/%s", ref);
+        if (get_sha1(longref, sha1) == 0)
+                return longref;
+
+        return ref;
+}
 
 void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern,
                     char *path, int pager)
 {
         struct rev_info rev;
         struct commit *commit;
-        const char *argv[] = {NULL, tip, NULL, NULL, NULL};
+        const char *argv[] = {NULL, NULL, NULL, NULL, NULL};
         int argc = 2;
         int i, columns = 3;
 
         if (!tip)
-                argv[1] = ctx.qry.head;
+                tip = ctx.qry.head;
+
+        argv[1] = disambiguate_ref(tip);
 
         if (grep && pattern && (!strcmp(grep, "grep") ||
                                 !strcmp(grep, "author") ||