$ git clone -n https://src.fedoraproject.org/rpms/ghc-data-default-class.git /var/lib/mock/f45-build-10196-414/root/chroot_tmpdir/scmroot/ghc-data-default-class
Cloning into '/var/lib/mock/f45-build-10196-414/root/chroot_tmpdir/scmroot/ghc-data-default-class'...
$ git fetch origin 3bcbbf2111d64caa4fc747737ad4340b65ec3c20:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-data-default-class
 * [new ref]         3bcbbf2111d64caa4fc747737ad4340b65ec3c20 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3bcbbf2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild