$ git clone -n https://src.fedoraproject.org/rpms/perl-DBIx-Connector.git /var/lib/mock/f45-build-22849-594/root/chroot_tmpdir/scmroot/perl-DBIx-Connector
Cloning into '/var/lib/mock/f45-build-22849-594/root/chroot_tmpdir/scmroot/perl-DBIx-Connector'...
$ git fetch origin b4cd15d21cf498346143369efb831b5de0a889a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DBIx-Connector
 * [new ref]         b4cd15d21cf498346143369efb831b5de0a889a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4cd15d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild