$ git clone -n https://src.fedoraproject.org/rpms/log4j.git /var/lib/mock/f40-build-2057188-49124/root/chroot_tmpdir/scmroot/log4j
Cloning into '/var/lib/mock/f40-build-2057188-49124/root/chroot_tmpdir/scmroot/log4j'...
$ git fetch origin 87910cfe55a5ba0242ba291a89cb9130c7cbc86d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/log4j
 * [new ref]         87910cfe55a5ba0242ba291a89cb9130c7cbc86d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 87910cf Update javapackages test plan to f40