$ git clone -n https://src.fedoraproject.org/rpms/ghc-hakyll.git /var/lib/mock/f31-build-100213-33237/root/thebuilddir/tmp/scmroot/ghc-hakyll
Cloning into '/var/lib/mock/f31-build-100213-33237/root/thebuilddir/tmp/scmroot/ghc-hakyll'...
$ git reset --hard 4df75f05a03c7de36006ee33c0adb982ecc7e276
HEAD is now at 4df75f0 BR prof for lib and static for executable