$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-FailWarnings.git /var/lib/mock/f45-build-26653-618/root/chroot_tmpdir/scmroot/perl-Test-FailWarnings
Cloning into '/var/lib/mock/f45-build-26653-618/root/chroot_tmpdir/scmroot/perl-Test-FailWarnings'...
$ git fetch origin 3bd056670fc88579d4c471a21a45bb2d9e79d39d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-FailWarnings
 * [new ref]         3bd056670fc88579d4c471a21a45bb2d9e79d39d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3bd0566 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild