$ git clone -n https://git.cclinux.org/stage/rpms/tomcat.git /var/lib/mock/dist-circle9-build-120602-85265/root/chroot_tmpdir/scmroot/tomcat
Cloning into '/var/lib/mock/dist-circle9-build-120602-85265/root/chroot_tmpdir/scmroot/tomcat'...
$ git fetch origin 3556eaaf7ead6ef9080d3aa2f8e9d2e5963ac941:KOJI_FETCH_HEAD
From https://git.cclinux.org/stage/rpms/tomcat
 * [new ref]         3556eaaf7ead6ef9080d3aa2f8e9d2e5963ac941 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3556eaa import tomcat-9.0.62-39.el9