t / t5100 / rfc2047-info-0004on commit receive-pack: don't pass non-existent refs to post-{receive,update} hooks (160b81e)
   1Author: Nathaniel Borenstein (םולש ןב ילטפנ)
   2Email: nsb@thumper.bellcore.com
   3Subject: Test of new header generator
   4