Fix sed call

OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-pre-commit?expand=0&rev=2

python-pre-commit.spec

@@ -1,7 +1,7 @@
 #
 # spec file for package python-pre-commit
 #
-# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2019 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -15,6 +15,7 @@
 # Please submit bugfixes or comments via https://bugs.opensuse.org/
 #
 
+
 %define skip_python2 1
 %{?!python_module:%define python_module() python-%{**} python3-%{**}}
 Name:           python-pre-commit
@@ -43,7 +44,6 @@ Requires:       python-importlib_resources
 %endif
 BuildArch:      noarch
 # SECTION test requirements
-BuildRequires:  python3
 BuildRequires:  %{python_module PyYAML}
 BuildRequires:  %{python_module aspy.yaml}
 BuildRequires:  %{python_module cfgv >= 1.4.0}
@@ -58,6 +58,7 @@ BuildRequires:  %{python_module virtualenv >= 15.2}
 BuildRequires:  git-core
 BuildRequires:  python2-futures
 BuildRequires:  python2-importlib_resources
+BuildRequires:  python3
 # /SECTION
 %python_subpackages
 
@@ -67,7 +68,7 @@ A framework for managing and maintaining multi-language pre-commit hooks.
 %prep
 %setup -q -n pre-commit-%{version}
 rm pre_commit/color_windows.py
-sed -i 's|^#!/usr/bin/env python|#!/usr/bin/python3|' pre_commit/resources/hook-tmpl
+sed -i 's|^#!/usr/bin/env python|#!%{_bindir}/python|' pre_commit/resources/hook-tmpl
 
 %build
 %python_build