$ git clone -n https://src.fedoraproject.org/rpms/tomcat.git /var/lib/mock/f41-build-725854-13123/root/chroot_tmpdir/scmroot/tomcat
Cloning into '/var/lib/mock/f41-build-725854-13123/root/chroot_tmpdir/scmroot/tomcat'...
$ git fetch origin 9f4d5c76f549c6a11c349097c60bc44662663248:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tomcat
 * [new ref]         9f4d5c76f549c6a11c349097c60bc44662663248 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f4d5c7 Update to 10.1.24