$ git clone -n https://gitee.com/src-opencloudos-rpms/linuxptp.git /var/lib/mock/dist-oc9-build-70647-47457/root/chroot_tmpdir/scmroot/linuxptp
Cloning into '/var/lib/mock/dist-oc9-build-70647-47457/root/chroot_tmpdir/scmroot/linuxptp'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/linuxptp
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f617b3 import linuxptp-4.2-1.tl4