$ git clone -n https://src.fedoraproject.org/rpms/perl-GDGraph.git /var/lib/mock/f45-build-23764-599/root/chroot_tmpdir/scmroot/perl-GDGraph
Cloning into '/var/lib/mock/f45-build-23764-599/root/chroot_tmpdir/scmroot/perl-GDGraph'...
$ git fetch origin ed704fca58ed465338e1d175cda370093aece51e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-GDGraph
 * [new ref]         ed704fca58ed465338e1d175cda370093aece51e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed704fc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild