$ git clone -n https://src.fedoraproject.org/rpms/rubygem-semantic_puppet.git /var/lib/mock/f40-build-2034343-47884/root/chroot_tmpdir/scmroot/rubygem-semantic_puppet
Cloning into '/var/lib/mock/f40-build-2034343-47884/root/chroot_tmpdir/scmroot/rubygem-semantic_puppet'...
$ git fetch origin 897e5680d7ab05629e21b2d46f874265d163abaa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-semantic_puppet
 * [new ref]         897e5680d7ab05629e21b2d46f874265d163abaa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 897e568 Update to 1.1.0