$ git clone -n https://src.fedoraproject.org/rpms/ghc-regex-tdfa.git /var/lib/mock/f31-build-54787-28055/root/chroot_tmpdir/scmroot/ghc-regex-tdfa
Cloning into '/var/lib/mock/f31-build-54787-28055/root/chroot_tmpdir/scmroot/ghc-regex-tdfa'...
$ git reset --hard 75b8128141c08ef636f0f79a8a0266007ec41073
HEAD is now at 75b8128 refresh to cabal-rpm-0.13