$ git clone -n https://src.fedoraproject.org/rpms/ghc-cprng-aes.git /var/lib/mock/f40-build-743583-111265/root/chroot_tmpdir/scmroot/ghc-cprng-aes
Cloning into '/var/lib/mock/f40-build-743583-111265/root/chroot_tmpdir/scmroot/ghc-cprng-aes'...
$ git fetch origin 7056a48e37bf5a9d255b442264105ae42da3be1a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cprng-aes
 * [new ref]         7056a48e37bf5a9d255b442264105ae42da3be1a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7056a48 bump release