$ git clone -n https://src.fedoraproject.org/rpms/perl-DBIx-Class.git /var/lib/mock/f45-build-22716-593/root/chroot_tmpdir/scmroot/perl-DBIx-Class
Cloning into '/var/lib/mock/f45-build-22716-593/root/chroot_tmpdir/scmroot/perl-DBIx-Class'...
$ git fetch origin 1bbaf2edd264e3be8e89edd4cd4bbb707269b1b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DBIx-Class
 * [new ref]         1bbaf2edd264e3be8e89edd4cd4bbb707269b1b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1bbaf2e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild