$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-NBName.git /var/lib/mock/f45-build-25328-610/root/chroot_tmpdir/scmroot/perl-Net-NBName
Cloning into '/var/lib/mock/f45-build-25328-610/root/chroot_tmpdir/scmroot/perl-Net-NBName'...
$ git fetch origin 85cdf497e0a2e755e294880c57a33068f7ed051e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-NBName
 * [new ref]         85cdf497e0a2e755e294880c57a33068f7ed051e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 85cdf49 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild