$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Reporter.git /var/lib/mock/f45-build-26827-619/root/chroot_tmpdir/scmroot/perl-Test-Reporter
Cloning into '/var/lib/mock/f45-build-26827-619/root/chroot_tmpdir/scmroot/perl-Test-Reporter'...
$ git fetch origin 465df37793289d2aceb4dcb9a94f09ccd6f46ca9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Reporter
 * [new ref]         465df37793289d2aceb4dcb9a94f09ccd6f46ca9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 465df37 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild