fix

Author: dark64

zokrates_core/build.rs

@@ -26,10 +26,9 @@ fn main() {
         });
 
         let commit = Oid::from_str(LIBSNARK_COMMIT).unwrap();
-        let commit = repo.find_commit(commit).unwrap();
-
-        repo.reset(&commit.as_object(), ResetType::Hard, None)
-            .unwrap();
+        let _ = repo
+            .find_commit(commit)
+            .and_then(|commit| repo.reset(&commit.as_object(), ResetType::Hard, None));
 
         for mut s in repo.submodules().unwrap() {
             s.update(true, None).unwrap();