PX4-Autopilot V1.12.3 build error

I am attempting to build PX4-Autopilot V1.12.3 on Ubuntu 18.04. The release was cloned from Release Stable Release v1.12.3 · PX4/PX4-Autopilot · GitHub and then put into a private BitBucket Repository. When I attempt to build, I get the following (note, I did a make px4_fmu-v5_default clean first):

coop@user-VirtualBox:~/PX4-Autopilot$ make px4_fmu-v5_default
[0/1362] git submodule platforms/nuttx/NuttX/nuttx
[2/1362] git submodule platforms/nuttx/NuttX/apps
[3/1362] git submodule src/lib/ecl
[8/1362] Generating git version header
FAILED: src/lib/version/build_git_version.h
cd /home/coop/PX4-Autopilot && /usr/bin/python3 /home/coop/PX4-Autopilot/src/lib/version/px_update_git_header.py /home/coop/PX4-Autopilot/build/px4_fmu-v5_default/src/lib/version/build_git_version.h --validate
Traceback (most recent call last):
File “/home/coop/PX4-Autopilot/src/lib/version/px_update_git_header.py”, line 125, in
cwd=‘src/lib/ecl’, stderr=subprocess.STDOUT).decode(‘utf-8’)
File “/usr/lib/python3.6/subprocess.py”, line 356, in check_output
File “/usr/lib/python3.6/subprocess.py”, line 438, in run
output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command ‘[‘git’, ‘describe’, ‘–always’, ‘–tags’, ‘–dirty’]’ returned non-zero exit status 128.
[9/1362] Generating uORB topic headers
ninja: build stopped: subcommand failed.
Makefile:224: recipe for target ‘px4_fmu-v5_default’ failed
make: *** [px4_fmu-v5_default] Error 1

What is interesting is, px_update_git_header.py line 123 test for existence of folder src/lib/ecl/.git. There is no .git folder under src/lib/ecl, yet line 125 is executed.

Ideas ?