[...]

warning: line 33: It's not recommended to have unversioned Obsoletes: Obsoletes:	alsa-driver-devel
warning: line 34: It's not recommended to have unversioned Obsoletes: Obsoletes:	glibc-kernel-headers
warning: line 35: It's not recommended to have unversioned Obsoletes: Obsoletes:	glibc-kernheaders
Building target platforms: i686-linux
Building for target i686-linux
Wrote: /home/users/builder/rpm/SRPMS/linux-libc-headers-5.10.1-1.src.rpm
real 7.27
user 6.88
sys 0.26
exit status 0
Writing package revision
builder: SMP make flags are set to -j2
fatal: HEAD does not point to a branch
warning: line 33: It's not recommended to have unversioned Obsoletes: Obsoletes:	alsa-driver-devel
warning: line 34: It's not recommended to have unversioned Obsoletes: Obsoletes:	glibc-kernel-headers
warning: line 35: It's not recommended to have unversioned Obsoletes: Obsoletes:	glibc-kernheaders
No conditional flags passed
from available:
--with   :	
--without:	 tests
Available branches: AC-branch DEVEL KERNEL LINUX_2_6_22 LINUX_2_6_27 LINUX_2_6_33 LINUX_2_6_7-2 LINUX_3_2 MMAZUR RA-branch_general master
linux-5.10.tar.xz having proper md5sum already exists
patch-5.10.1.xz having proper md5sum already exists
./builder[2756]: ulimit: exceeds allowable limit
warning: line 33: It's not recommended to have unversioned Obsoletes: Obsoletes:	alsa-driver-devel
warning: line 34: It's not recommended to have unversioned Obsoletes: Obsoletes:	glibc-kernel-headers
warning: line 35: It's not recommended to have unversioned Obsoletes: Obsoletes:	glibc-kernheaders
Building target platforms: i686-linux
Building for target i686-linux
Wrote: /home/users/builder/rpm/SRPMS/linux-libc-headers-5.10.1-1.src.rpm
real 7.35
user 6.70
sys 0.23
warning: line 33: It's not recommended to have unversioned Obsoletes: Obsoletes:	alsa-driver-devel
warning: line 34: It's not recommended to have unversioned Obsoletes: Obsoletes:	glibc-kernel-headers
warning: line 35: It's not recommended to have unversioned Obsoletes: Obsoletes:	glibc-kernheaders
Writing git revision for tag tld/linux-libc-headers-5.10.1-1
On detached HEAD. Use -r BRANCHNAME to override
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:15.93s sys:2.74s real:24.08s (faults io:18 non-io:241722)
Files queued for ftp:
 116668386 linux-libc-headers-5.10.1-1.src.rpm
       197 linux-libc-headers-5.10.1-1.src.rpm.uploadinfo
End-TLD-Builder-Info