Oh, I forgot to formate the outputs ...

output in log:
{{{
Building target platforms: x86_64
Building for target x86_64
Executing(%prep): /bin/sh -e /var/tmp/rpm-tmp.MQQrPL
Executing(%build): /bin/sh -e /var/tmp/rpm-tmp.bbPJZK
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for x86_64-unknown-linux-gnu-gcc... no
}}}

output in terminal:
{{{
[dan@eagle gtkterm]$ LANG=C fedpkg local
Building target platforms: x86_64
Building for target x86_64
Executing(%prep): /bin/sh -e /var/tmp/rpm-tmp.MQQrPL
+ umask 022
+ cd /home/dan/projects/fedora/tmp/gtkterm
+ LANG=C
+ export LANG
+ unset DISPLAY
+ cd /home/dan/projects/fedora/tmp/gtkterm
+ rm -rf gtkterm-0.99.6
+ /bin/mkdir -p gtkterm-0.99.6
+ cd gtkterm-0.99.6
+ /usr/bin/gzip -dc /home/dan/projects/fedora/tmp/gtkterm/gtkterm-0.99.6.tar.gz
+ /bin/tar -xf -
+ STATUS=0
+ '[' 0 -ne 0 ']'
+ /bin/chmod -Rf a+rX,u+w,g-w,o-w .
+ sed -i -e 's/0.99.5/0.99.6/g' configure
+ exit 0
Executing(%build): /bin/sh -e /var/tmp/rpm-tmp.bbPJZK
+ umask 022
+ cd /home/dan/projects/fedora/tmp/gtkterm
+ cd gtkterm-0.99.6
+ LANG=C
+ export LANG
+ unset DISPLAY
+ CFLAGS='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic'
+ export CFLAGS
+ CXXFLAGS='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic'
+ export CXXFLAGS
+ FFLAGS='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -I/usr/lib64/gfortran/modules'
+ export FFLAGS
+ ./configure --build=x86_64-unknown-linux-gnu --host=x86_64-unknown-linux-gnu --target=x86_64-redhat-linux-gnu --program-prefix= --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64 --libexecdir=/usr/libexec --localstatedir=/var --sharedstatedir=/var/lib --mandir=/usr/share/man --infodir=/usr/share/info
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for x86_64-unknown-linux-gnu-gcc... no
}}}

Ok, I can reproduce this. I suspect it's something with how tee is working, and how rpm outputs stuff.

Ugh yes. rpmbuild sends the stuff marked with + to stderr. Lovely.

Fixed in [1aa16f7]

Or for just the commands you care about:

{{{
--- a/src/pyfedpkg/init.py
+++ b/src/pyfedpkg/init.py
@@ -1408,7 +1408,7 @@ class PackageModule:
cmd.extend(["--define '_source_filedigest_algorithm %s'" % hashtype,
"--define '_binary_filedigest_algorithm %s'" % hashtype])
cmd.extend(['--target', arch, '-ba',
- os.path.join(self.path, self.spec)])
+ os.path.join(self.path, self.spec),'2>&1'])
logfile = '.build-%s-%s.log' % (self.ver, self.rel)
# Run the command
_run_command(cmd, shell=True, pipe=['tee', logfile])

}}}