$ git clone -n https://src.fedoraproject.org/rpms/ghc-yesod-core.git /var/lib/mock/f33-build-179532-45108/root/chroot_tmpdir/scmroot/ghc-yesod-core
Cloning into '/var/lib/mock/f33-build-179532-45108/root/chroot_tmpdir/scmroot/ghc-yesod-core'...
$ git reset --hard cd46dba864cbf16dcd0eeff9e20499015e1fa3b6
HEAD is now at cd46dba fix sources (yesod-core not rio)