$ git clone -n https://src.fedoraproject.org/rpms/ghc-optional-args.git /var/lib/mock/f45-build-10605-419/root/chroot_tmpdir/scmroot/ghc-optional-args
Cloning into '/var/lib/mock/f45-build-10605-419/root/chroot_tmpdir/scmroot/ghc-optional-args'...
$ git fetch origin a92a778d37a1fb9c0ebc85a7dd6ba76897eb29f9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-optional-args
 * [new ref]         a92a778d37a1fb9c0ebc85a7dd6ba76897eb29f9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a92a778 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild