$ git clone -n https://gitee.com/src-opencloudos-rpms/firefox.git /var/lib/mock/dist-oc9-build-248489-83706/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/dist-oc9-build-248489-83706/root/chroot_tmpdir/scmroot/firefox'...
$ git fetch origin b099b63588e07876aa53c5710d346a39355db8e6:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/firefox
 * [new ref]         b099b63588e07876aa53c5710d346a39355db8e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b099b63 import firefox-140.15.0-1.tl4.ap.1