$ git clone -n https://src.fedoraproject.org/rpms/ghc-cipher-aes.git /var/lib/mock/f40-build-2152198-50906/root/chroot_tmpdir/scmroot/ghc-cipher-aes
Cloning into '/var/lib/mock/f40-build-2152198-50906/root/chroot_tmpdir/scmroot/ghc-cipher-aes'...
$ git fetch origin 0519791395ab036abc780dc8c345e28ce96eeb4e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cipher-aes
 * [new ref]         0519791395ab036abc780dc8c345e28ce96eeb4e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0519791 bump release