$ git clone -n https://gitee.com/src-opencloudos-rpms/xorg-x11-drv-dummy.git /var/lib/mock/dist-oc9-build-72332-47679/root/chroot_tmpdir/scmroot/xorg-x11-drv-dummy
Cloning into '/var/lib/mock/dist-oc9-build-72332-47679/root/chroot_tmpdir/scmroot/xorg-x11-drv-dummy'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/xorg-x11-drv-dummy
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c04ef9 import xorg-x11-drv-dummy-0.4.0-4.tl4