$ git clone -n https://src.fedoraproject.org/rpms/ghc-atomic-write.git /var/lib/mock/f45-build-9981-412/root/chroot_tmpdir/scmroot/ghc-atomic-write
Cloning into '/var/lib/mock/f45-build-9981-412/root/chroot_tmpdir/scmroot/ghc-atomic-write'...
$ git fetch origin 6ebd597c7942c3c696d28d255d897032c5bf1aa9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-atomic-write
 * [new ref]         6ebd597c7942c3c696d28d255d897032c5bf1aa9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ebd597 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild