$ git clone -n https://gitee.com/src-opencloudos-rpms/libXv.git /var/lib/mock/dist-oc9-build-70637-47457/root/chroot_tmpdir/scmroot/libXv
Cloning into '/var/lib/mock/dist-oc9-build-70637-47457/root/chroot_tmpdir/scmroot/libXv'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libXv
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a1d629 import libXv-1.0.12-2.tl4