$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-DiagINC.git /var/lib/mock/f45-build-26623-618/root/chroot_tmpdir/scmroot/perl-Test-DiagINC
Cloning into '/var/lib/mock/f45-build-26623-618/root/chroot_tmpdir/scmroot/perl-Test-DiagINC'...
$ git fetch origin 8afc0df0be62e9819fba9841dd7a8251c8ede7a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-DiagINC
 * [new ref]         8afc0df0be62e9819fba9841dd7a8251c8ede7a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8afc0df Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild