$ git clone -n git+ssh://git@codeup.openanolis.cn/codeup/anolis-os/mailman.git /var/lib/mock/dist-an7-build-32284-15963/root/chroot_tmpdir/scmroot/mailman
Cloning into '/var/lib/mock/dist-an7-build-32284-15963/root/chroot_tmpdir/scmroot/mailman'...
$ git reset --hard origin/a7
HEAD is now at 4b2fdb7 import mailman-2.1.15-26.el7_4.1.src.rpm