$ git clone -n https://src.fedoraproject.org/rpms/fdupes.git /var/lib/mock/f40-build-789022-135482/root/chroot_tmpdir/scmroot/fdupes
Cloning into '/var/lib/mock/f40-build-789022-135482/root/chroot_tmpdir/scmroot/fdupes'...
$ git fetch origin 0b98603493eaca9d7c8d24bb8dac8ab7f338a7dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fdupes
 * [new ref]         0b98603493eaca9d7c8d24bb8dac8ab7f338a7dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b98603 Update to 2.3.0.