$ git clone -n https://src.fedoraproject.org/rpms/ghc-attoparsec-binary.git /var/lib/mock/f41-build-839151-160038/root/chroot_tmpdir/scmroot/ghc-attoparsec-binary
Cloning into '/var/lib/mock/f41-build-839151-160038/root/chroot_tmpdir/scmroot/ghc-attoparsec-binary'...
$ git fetch origin 36737de4a9380e03551b66c3eee6766bdf99cec0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-attoparsec-binary
 * [new ref]         36737de4a9380e03551b66c3eee6766bdf99cec0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36737de bump release