$ git clone -n https://src.fedoraproject.org/rpms/octave-miscellaneous.git /var/lib/mock/f40-build-2265515-54602/root/chroot_tmpdir/scmroot/octave-miscellaneous
Cloning into '/var/lib/mock/f40-build-2265515-54602/root/chroot_tmpdir/scmroot/octave-miscellaneous'...
$ git fetch origin 8e6c8db4deddc52c72ab83fad2d1cafbc122923c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-miscellaneous
 * [new ref]         8e6c8db4deddc52c72ab83fad2d1cafbc122923c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e6c8db unuse 2to3 which is scheduled to be removed