$ git clone -n https://src.fedoraproject.org/rpms/golang-github-siddontang-goredis.git /var/lib/mock/f41-build-1068440-19640/root/chroot_tmpdir/scmroot/golang-github-siddontang-goredis
Cloning into '/var/lib/mock/f41-build-1068440-19640/root/chroot_tmpdir/scmroot/golang-github-siddontang-goredis'...
$ git fetch origin c1ac9e81d62c29f01ecd1f4059974dcc9a75f54a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-siddontang-goredis
 * [new ref]         c1ac9e81d62c29f01ecd1f4059974dcc9a75f54a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c1ac9e8 Fix FTBFS