$ git clone -n https://src.fedoraproject.org/rpms/ghc-concurrent-extra.git /var/lib/mock/f33-build-286904-53783/root/chroot_tmpdir/scmroot/ghc-concurrent-extra
Cloning into '/var/lib/mock/f33-build-286904-53783/root/chroot_tmpdir/scmroot/ghc-concurrent-extra'...
$ git reset --hard 39669122468e8d63ae17501fc1b68455ec6271ec
HEAD is now at 3966912 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild