$ git clone -n https://src.fedoraproject.org/rpms/disruptor.git /var/lib/mock/f40-build-2217492-52550/root/chroot_tmpdir/scmroot/disruptor
Cloning into '/var/lib/mock/f40-build-2217492-52550/root/chroot_tmpdir/scmroot/disruptor'...
$ git fetch origin 0b8d1b9ad4469fd2ceb8336c07b968e6e3ffdeb9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/disruptor
 * [new ref]         0b8d1b9ad4469fd2ceb8336c07b968e6e3ffdeb9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b8d1b9 Update javapackages test plan to f40