Проблема с клонированием Git репозитария
Буквально на днях столкнулись с аналогичной проблемой на github. Саппорт ответил:

I've just found the problem. Some external program has created two references in a non-standard reference path for your repository:

9bebfe5719bba5dc39b27f9fdfb872b4f56c1029 refs/for/refs/heads/dev
 c165d9c5adea628a67c1ede7aca6232aee53e86c refs/for/refs/heads/master

The `refs/for/refs` path is non-standard and confuses old Git clients. AFAIK, these references are created by Gerrit. I've manually removed those two references, and clones should work again, but if you continue using Gerrit, the problem will persist. The only workaround is updating your version of Git to the bleeding edge.

Обновили клиенты до 1.7.10 и проблема ушла.
Если не важна история, то просто пересоздайте репозиторий. Там может куча разный проблем и куча решений.