$ git clone -n https://src.fedoraproject.org/rpms/ghc-regex-tdfa.git /var/lib/mock/f31-build-94537-32495/root/chroot_tmpdir/scmroot/ghc-regex-tdfa
Cloning into '/var/lib/mock/f31-build-94537-32495/root/chroot_tmpdir/scmroot/ghc-regex-tdfa'...
$ git reset --hard b6f7e66859fad531bfc0810875592bc0fb23e3c0
HEAD is now at b6f7e66 BR prof for lib and static for executable