$ git clone -n https://gitee.com/src-opencloudos-rpms/pixman.git /var/lib/mock/dist-oc9-build-62843-16463/root/chroot_tmpdir/scmroot/pixman
Cloning into '/var/lib/mock/dist-oc9-build-62843-16463/root/chroot_tmpdir/scmroot/pixman'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/pixman
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3f878d import pixman-0.42.2-2.tl4