$ git clone -n https://gitee.com/mgb01105731/grub2.git /var/lib/mock/dist-an23-build-129396-46259/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-an23-build-129396-46259/root/chroot_tmpdir/scmroot/grub2'...
$ git reset --hard origin/a23
HEAD is now at 0a2269b add doc package