$ git clone -n https://gitee.com/src-opencloudos-rpms/qt5-qtserialport.git /var/lib/mock/dist-oc9-build-44848-14591/root/chroot_tmpdir/scmroot/qt5-qtserialport
Cloning into '/var/lib/mock/dist-oc9-build-44848-14591/root/chroot_tmpdir/scmroot/qt5-qtserialport'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/qt5-qtserialport
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac9fb1c import qt5-qtserialport-5.15.7-3.tl4