$ git clone -n https://gitee.com/opencloudos-stream/ghc-double-conversion.git /var/lib/mock/dist-oc9-epol-build-212199-80720/root/chroot_tmpdir/scmroot/ghc-double-conversion
Cloning into '/var/lib/mock/dist-oc9-epol-build-212199-80720/root/chroot_tmpdir/scmroot/ghc-double-conversion'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/ghc-double-conversion
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce1f71f update to Version 2.0.5.0