$ git clone -n https://src.fedoraproject.org/rpms/perl-ConfigReader.git /var/lib/mock/f45-build-22557-593/root/chroot_tmpdir/scmroot/perl-ConfigReader
Cloning into '/var/lib/mock/f45-build-22557-593/root/chroot_tmpdir/scmroot/perl-ConfigReader'...
$ git fetch origin f1c17b5662affb1e08bb48e1c6281544a4f63b08:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-ConfigReader
 * [new ref]         f1c17b5662affb1e08bb48e1c6281544a4f63b08 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f1c17b5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild