$ git clone -n https://gitee.com/src-opencloudos-rpms/tomcat.git /var/lib/mock/dist-oc9-build-250971-84053/root/chroot_tmpdir/scmroot/tomcat
Cloning into '/var/lib/mock/dist-oc9-build-250971-84053/root/chroot_tmpdir/scmroot/tomcat'...
$ git fetch origin 15a8e38e4f3d912b4efef50d401b77cfb306c2dc:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/tomcat
 * [new ref]         15a8e38e4f3d912b4efef50d401b77cfb306c2dc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15a8e38 import tomcat-9.0.121-2.tl4