$ git clone -n https://src.fedoraproject.org/rpms/ghc-nanospec.git /var/lib/mock/f31-build-116736-34579/root/chroot_tmpdir/scmroot/ghc-nanospec
Cloning into '/var/lib/mock/f31-build-116736-34579/root/chroot_tmpdir/scmroot/ghc-nanospec'...
$ git reset --hard e28e25d9376135b16449994abdcda8bc3254ddad
HEAD is now at e28e25d BR prof for lib and static for executable