$ git clone -n https://gitee.com/src-opencloudos-rpms/thunderbird.git /var/lib/mock/dist-oc8-firefox-build-239640-82612/root/chroot_tmpdir/scmroot/thunderbird
Cloning into '/var/lib/mock/dist-oc8-firefox-build-239640-82612/root/chroot_tmpdir/scmroot/thunderbird'...
$ git fetch origin 708f10b3a5fd01a13f9729a8352b46dfc81dcee2:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/thunderbird
 * [new ref]         708f10b3a5fd01a13f9729a8352b46dfc81dcee2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 708f10b import thunderbird-140.10.0-1.tl3.ap.1