$ git clone -n https://src.fedoraproject.org/rpms/perl-PDL.git /var/lib/mock/f40-build-779290-130260/root/chroot_tmpdir/scmroot/perl-PDL
Cloning into '/var/lib/mock/f40-build-779290-130260/root/chroot_tmpdir/scmroot/perl-PDL'...
$ git fetch origin 596042d05a8b9983513e51c39d9c53042788b1d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-PDL
 * [new ref]         596042d05a8b9983513e51c39d9c53042788b1d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 596042d Filter modules bundled for tests