$ git clone -n https://src.fedoraproject.org/rpms/perl-SVGPDF.git /var/lib/mock/f41-build-3152007-40566/root/chroot_tmpdir/scmroot/perl-SVGPDF
Cloning into '/var/lib/mock/f41-build-3152007-40566/root/chroot_tmpdir/scmroot/perl-SVGPDF'...
$ git fetch origin ffc256d0738ba747d684a511f53ce94d0b6fd9ac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-SVGPDF
 * [new ref]         ffc256d0738ba747d684a511f53ce94d0b6fd9ac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ffc256d Upgrade to upstream.