$ git clone -n https://src.fedoraproject.org/rpms/mpfi.git /var/lib/mock/f40-build-2265414-54599/root/chroot_tmpdir/scmroot/mpfi
Cloning into '/var/lib/mock/f40-build-2265414-54599/root/chroot_tmpdir/scmroot/mpfi'...
$ git fetch origin 75f06b520a68b8a461488e2386a6b5cca6f501fd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mpfi
 * [new ref]         75f06b520a68b8a461488e2386a6b5cca6f501fd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 75f06b5 Simpler fix for the pkgconfig file