$ git clone -n https://gitee.com/gaohongmei/python-tornado.git /var/lib/mock/dist-an8.6-build-125919-46180/root/chroot_tmpdir/scmroot/python-tornado
Cloning into '/var/lib/mock/dist-an8.6-build-125919-46180/root/chroot_tmpdir/scmroot/python-tornado'...
$ git reset --hard 17e0b308c1958ccf918ddd60d9842153fdb1d829
HEAD is now at 17e0b30 import python-tornado-4.2.1-5.el7.src.rpm