$ git clone -n https://src.fedoraproject.org/rpms/python3.9.git /var/lib/mock/f40-build-752705-116826/root/chroot_tmpdir/scmroot/python3.9
Cloning into '/var/lib/mock/f40-build-752705-116826/root/chroot_tmpdir/scmroot/python3.9'...
$ git fetch origin d25ca05b8fcb9dbba05f1385a989ef658ac0fce8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python3.9
 * [new ref]         d25ca05b8fcb9dbba05f1385a989ef658ac0fce8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d25ca05 Fix implicit int compiler warning in configure check for PTHREAD_SCOPE_SYSTEM