$ git clone -n https://gitee.com/src-opencloudos-rpms/tigervnc.git /var/lib/mock/dist-oc9-build-52265-14596/root/chroot_tmpdir/scmroot/tigervnc
Cloning into '/var/lib/mock/dist-oc9-build-52265-14596/root/chroot_tmpdir/scmroot/tigervnc'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/tigervnc
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b18c2e6 import tigervnc-1.12.0-4.tl4