$ git clone -n https://gitee.com/src-opencloudos-rpms/thunderbird.git /var/lib/mock/dist-oc8-firefox-build-81176-54825/root/chroot_tmpdir/scmroot/thunderbird
Cloning into '/var/lib/mock/dist-oc8-firefox-build-81176-54825/root/chroot_tmpdir/scmroot/thunderbird'...
$ git fetch origin 77b6215859a513e102d5d6498c4a4a69c300b86a:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/thunderbird
 * [new ref]         77b6215859a513e102d5d6498c4a4a69c300b86a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 77b6215 Add auto-patch changlog