From: David Turner <david.turner@twosigma.com>
Date: Tue, 01 Aug 2017 20:10:44 GMT
Subject: git-fast-export doesn't support mergetag header
Message-ID: <9955b90cde034eee8c2cdb33064b9262@exmbdft7.ad.twosigma.com>

It looks to me like git-fast-export doesn't export the mergetag header on a commit.  Is this intentional, or an oversight?