$ git clone -n https://src.fedoraproject.org/rpms/perl-Sys-Virt-TCK.git /var/lib/mock/f45-build-26360-617/root/chroot_tmpdir/scmroot/perl-Sys-Virt-TCK
Cloning into '/var/lib/mock/f45-build-26360-617/root/chroot_tmpdir/scmroot/perl-Sys-Virt-TCK'...
$ git fetch origin 809cceffc4721fe05569bdf9742e7d8397af91f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sys-Virt-TCK
 * [new ref]         809cceffc4721fe05569bdf9742e7d8397af91f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 809ccef Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild