$ git clone -n https://src.fedoraproject.org/rpms/ghc-json.git /var/lib/mock/f40-build-742453-110760/root/chroot_tmpdir/scmroot/ghc-json
Cloning into '/var/lib/mock/f40-build-742453-110760/root/chroot_tmpdir/scmroot/ghc-json'...
$ git reset --hard d850dca82032a55c20b96d89daf5301194a00d7c
HEAD is now at d850dca bump release