$ git clone -n https://gitee.com/src-opencloudos-rpms/gdm.git /var/lib/mock/dist-oc8-build-38131-12270/root/chroot_tmpdir/scmroot/gdm
Cloning into '/var/lib/mock/dist-oc8-build-38131-12270/root/chroot_tmpdir/scmroot/gdm'...
$ git reset --hard origin/oc8
HEAD is now at 4fe7628 import gdm-40.0-27.tl3