Description of problem:
Package nordugrid-arc fails to build from source against libs3-4.0-0.1.20170206git208bcba.fc26 in Fedora Rawhide 

Version-Release number of selected component (if applicable):
5.3.0-0.2.rc1.fc26

Steps to Reproduce:
koji build --scratch f26 nordugrid-arc-5.3.0-0.2.rc1.fc26.src.rpm

Additional info:
This package is tracked by Koschei. See:
http://apps.fedoraproject.org/koschei/package/nordugrid-arc

The failures are related to the following commit in libs3:

commit 552a45a9bcdfe18b139cfabd428694bca4ec756e
Author:     Andrei Kopats <andrei.kopats>
AuthorDate: Fri Feb 3 18:11:57 2017 +0300
Commit:     Andrei Kopats <andrei.kopats>
CommitDate: Fri Feb 3 18:11:57 2017 +0300

    set request timeout for all functions

Example of errors:
DataPointS3.cpp: In member function 'virtual Arc::DataStatus ArcDMCS3::DataPointS3::Stat(Arc::FileInfo&, Arc::DataPoint::DataPointInfoType)':
DataPointS3.cpp:302:60: error: invalid conversion from 'S3ResponseHandler*' to 'int' [-fpermissive]
     S3_head_object(&bucketContext, key_name.c_str(), NULL, &responseHandler,
                                                            ^~~~~~~~~~~~~~~~
DataPointS3.cpp:303:25: error: cannot convert 'Arc::FileInfo*' to 'const S3ResponseHandler*' for argument '5' to 'void S3_head_object(const S3BucketContext*, const char*, S3RequestContext*, int, const S3ResponseHandler*, void*)'
                    &file);
                         ^
DataPointS3.cpp: In member function 'virtual Arc::DataStatus ArcDMCS3::DataPointS3::List(std::__cxx11::list<Arc::FileInfo>&, Arc::DataPoint::DataPointInfoType)':
DataPointS3.cpp:371:60: error: invalid conversion from 'S3ResponseHandler*' to 'int' [-fpermissive]
     S3_head_object(&bucketContext, key_name.c_str(), NULL, &responseHandler,
                                                            ^~~~~~~~~~~~~~~~
DataPointS3.cpp:372:25: error: cannot convert 'Arc::FileInfo*' to 'const S3ResponseHandler*' for argument '5' to 'void S3_head_object(const S3BucketContext*, const char*, S3RequestContext*, int, const S3ResponseHandler*, void*)'
                    &file);
                         ^