[osbuild-composer] Image Builder fails with "No space left on device"

Issue

After trying a compose, it fails with the below error:

Stage org.osbuild.copy
Output:
 :
cp: cannot create symbolic link '/run/osbuild/mounts/././lib64': No space left on device
cp: cannot create directory '/run/osbuild/mounts/././media': No space left on device
cp: cannot create symbolic link '/run/osbuild/mounts/././bin': No space left on device
cp: cannot create symbolic link '/run/osbuild/mounts/././sbin': No space left on device
Traceback (most recent call last):
  File "/run/osbuild/bin/org.osbuild.copy", line 140, in <module>
    r = main(_args, _args["options"])
  File "/run/osbuild/bin/org.osbuild.copy", line 133, in main
    check=True)
  File "/usr/lib64/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['cp', '-a', '--reflink=auto', '/run/osbuild/inputs/root-tree/.', '/run/osbuild/mounts/.']' returned non-zero exit status 1.