SRPMs generated by build-srpm.sh don't build in EPEL7/Fedora 20

[abustany]

Somehow something goes wrong at the %files step, and it does not find the README.

Relevant log output:

Processing files: s3proxy-0-20140627T140152Z.gitfb42d20.fc20.x86_64
Executing(%doc): /bin/sh -e /var/tmp/rpm-tmp.XRfnP6
+ umask 022
+ cd /builddir/build/BUILD
+ cd s3proxy-20140627T140152Z.gitfb42d20
+ DOCDIR=/builddir/build/BUILDROOT/s3proxy-0-20140627T140152Z.gitfb42d20.fc20.x86_64/usr/share/doc/s3proxy
+ export DOCDIR
+ /usr/bin/mkdir -p /builddir/build/BUILDROOT/s3proxy-0-20140627T140152Z.gitfb42d20.fc20.x86_64/usr/share/doc/s3proxy
++ readlink /builddir/build/BUILDROOT/s3proxy-0-20140627T140152Z.gitfb42d20.fc20.x86_64/usr/share/doc/s3proxy
+ cp -pr /README.md /builddir/build/BUILDROOT/s3proxy-0-20140627T140152Z.gitfb42d20.fc20.x86_64/usr/share/doc/s3proxy
cp: cannot stat '/README.md': No such file or directory
error: Bad exit status from /var/tmp/rpm-tmp.XRfnP6 (%doc)
RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.XRfnP6 (%doc)
Child return code was: 1