$ git clone -n https://gitee.com/src-opencloudos-rpms/tomcat.git /var/lib/mock/dist-oc9-build-244449-83230/root/chroot_tmpdir/scmroot/tomcat
Cloning into '/var/lib/mock/dist-oc9-build-244449-83230/root/chroot_tmpdir/scmroot/tomcat'...
$ git fetch origin fde21f12c2a651d4565a5de59368129e63ef66b5:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/tomcat
 * [new ref]         fde21f12c2a651d4565a5de59368129e63ef66b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fde21f1 import tomcat-9.0.120-1.tl4