$ git clone -n https://gitee.com/src-opencloudos-rpms/tomcat.git /var/lib/mock/dist-oc9-build-229200-81295/root/chroot_tmpdir/scmroot/tomcat
Cloning into '/var/lib/mock/dist-oc9-build-229200-81295/root/chroot_tmpdir/scmroot/tomcat'...
$ git fetch origin 4b7f9827ba1d30f32c649a392207bbe6a54df9c7:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/tomcat
 * [new ref]         4b7f9827ba1d30f32c649a392207bbe6a54df9c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b7f982 import tomcat-9.0.86-16.tl4