$ git clone -n https://src.fedoraproject.org/rpms/perl-B-Lint.git /var/lib/mock/f45-build-21845-588/root/chroot_tmpdir/scmroot/perl-B-Lint
Cloning into '/var/lib/mock/f45-build-21845-588/root/chroot_tmpdir/scmroot/perl-B-Lint'...
$ git fetch origin bc65b8ac7dda2729efc40855a34f25c542db07d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-B-Lint
 * [new ref]         bc65b8ac7dda2729efc40855a34f25c542db07d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc65b8a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild