$ git clone -n https://gitee.com/src-opencloudos-rpms/thunderbird.git /var/lib/mock/dist-oc9-build-52263-14596/root/chroot_tmpdir/scmroot/thunderbird
Cloning into '/var/lib/mock/dist-oc9-build-52263-14596/root/chroot_tmpdir/scmroot/thunderbird'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/thunderbird
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1aeb779 import thunderbird-102.9.0-4.tl4