$ git clone -n https://gitee.com/src-opencloudos-rpms/firefox.git /var/lib/mock/dist-oc9-build-242508-82991/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/dist-oc9-build-242508-82991/root/chroot_tmpdir/scmroot/firefox'...
$ git fetch origin b6f48886dae0c64935f9cffe9399e9a7eee73ce5:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/firefox
 * [new ref]         b6f48886dae0c64935f9cffe9399e9a7eee73ce5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6f4888 import firefox-140.12.0-1.tl4.ap.1