$ git clone -n https://src.fedoraproject.org/rpms/psi-plus.git /var/lib/mock/f40-build-800830-143643/root/chroot_tmpdir/scmroot/psi-plus
Cloning into '/var/lib/mock/f40-build-800830-143643/root/chroot_tmpdir/scmroot/psi-plus'...
$ git reset --hard f1982f07cc30cbb06860056a1b1d14ce488a47dc
HEAD is now at f1982f0 Fixed FTBFS on F40+.