python-xbout buildrequires python3-setuptools_scm_git_archive. python-setuptools_scm_git_archive has been obsoleted by python-setuptools_scm. It has stopped building in Fedora Rawhide (40). Once main Python in Fedora is updated to the next version (Python 3.13, ~June 2024), it will stop being installable and will cause FTBFS for the dependent packages, like python-xbout. Pleace update your package to a version not relying on python-setuptools_scm_git_archive or notify upstream to migrate away from it. Let us know here if you have any questions. Thank You!
This bug appears to have been reported against 'rawhide' during the Fedora Linux 40 development cycle. Changing version to 40.