$ git clone -n https://gitee.com/gcdota930915/gnome-boxes.git /var/lib/mock/dist-an8.7-build-174445-59037/root/chroot_tmpdir/scmroot/gnome-boxes
Cloning into '/var/lib/mock/dist-an8.7-build-174445-59037/root/chroot_tmpdir/scmroot/gnome-boxes'...
$ git reset --hard origin/a8
HEAD is now at 42ae18a update to gnome-boxes-40.3