$ git clone -n https://src.fedoraproject.org/rpms/mingw-fftw.git /var/lib/mock/f45-build-18426-515/root/chroot_tmpdir/scmroot/mingw-fftw
Cloning into '/var/lib/mock/f45-build-18426-515/root/chroot_tmpdir/scmroot/mingw-fftw'...
$ git fetch origin ae64e314a187e6bc9d3ad6443a6b5767cf4eb59b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-fftw
 * [new ref]         ae64e314a187e6bc9d3ad6443a6b5767cf4eb59b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae64e31 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild