$ git clone -n https://gitee.com/gcdota930915/mutter.git /var/lib/mock/dist-an8.7-build-172452-58968/root/chroot_tmpdir/scmroot/mutter
Cloning into '/var/lib/mock/dist-an8.7-build-172452-58968/root/chroot_tmpdir/scmroot/mutter'...
$ git reset --hard origin/a8
HEAD is now at 9d1f7d6 Add doc sub package