$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-Dumper.git /var/lib/mock/f41-build-816899-150476/root/chroot_tmpdir/scmroot/perl-Data-Dumper
Cloning into '/var/lib/mock/f41-build-816899-150476/root/chroot_tmpdir/scmroot/perl-Data-Dumper'...
$ git fetch origin 83d834a2c33347ea24c7604e7a83a1295b16a245:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-Dumper
 * [new ref]         83d834a2c33347ea24c7604e7a83a1295b16a245 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 83d834a Perl 5.40 re-rebuild of bootstrapped packages