$ git clone -n https://src.fedoraproject.org/rpms/perl-RDF-Trine.git /var/lib/mock/f41-build-side-1-2807237-32872/root/chroot_tmpdir/scmroot/perl-RDF-Trine
Cloning into '/var/lib/mock/f41-build-side-1-2807237-32872/root/chroot_tmpdir/scmroot/perl-RDF-Trine'...
$ git fetch origin 33094287257442cd5b8336e001307b79539e4e93:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-RDF-Trine
 * [new ref]         33094287257442cd5b8336e001307b79539e4e93 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3309428 Modernize a spec file