$ git clone -n https://gitee.com/src-opencloudos-rpms/thunderbird /var/lib/mock/dist-oc8-build-20438-5037/root/chroot_tmpdir/scmroot/thunderbird
Cloning into '/var/lib/mock/dist-oc8-build-20438-5037/root/chroot_tmpdir/scmroot/thunderbird'...
$ git reset --hard origin/oc8
HEAD is now at 98b3f9b import thunderbird-91.9.1-1.oc8_6