$ git clone -n https://src.fedoraproject.org/rpms/ghc-bytes.git /var/lib/mock/f40-build-746065-112349/root/chroot_tmpdir/scmroot/ghc-bytes
Cloning into '/var/lib/mock/f40-build-746065-112349/root/chroot_tmpdir/scmroot/ghc-bytes'...
$ git fetch origin e0481ea583cc4a0c2ab57d156b6f5b019b66a1b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-bytes
 * [new ref]         e0481ea583cc4a0c2ab57d156b6f5b019b66a1b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0481ea Convert to %autorelease and %autochangelog