$ git clone -n https://gitee.com/opencloudos-stream/thunderbird.git /var/lib/mock/dist-oc9-epol-build-237179-82369/root/chroot_tmpdir/scmroot/thunderbird
Cloning into '/var/lib/mock/dist-oc9-epol-build-237179-82369/root/chroot_tmpdir/scmroot/thunderbird'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/thunderbird
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a0676e !29 Update to 140.9.0. Merge pull request !29 from jiaxinyyang/master