$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Exception.git /var/lib/mock/f45-build-26648-618/root/chroot_tmpdir/scmroot/perl-Test-Exception
Cloning into '/var/lib/mock/f45-build-26648-618/root/chroot_tmpdir/scmroot/perl-Test-Exception'...
$ git fetch origin 4cb5eb50dc3e3be97e353aa8555ff7e7f1642580:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Exception
 * [new ref]         4cb5eb50dc3e3be97e353aa8555ff7e7f1642580 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4cb5eb5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild