$ git clone -n https://src.fedoraproject.org/rpms/kfloppy.git /var/lib/mock/f40-build-2525380-61810/root/chroot_tmpdir/scmroot/kfloppy
Cloning into '/var/lib/mock/f40-build-2525380-61810/root/chroot_tmpdir/scmroot/kfloppy'...
$ git fetch origin a492a295c2859c9c774c0b4b6f83a335b9018167:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kfloppy
 * [new ref]         a492a295c2859c9c774c0b4b6f83a335b9018167 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a492a29 fixed bz#261279 - FTBFS