$ git clone -n https://src.fedoraproject.org/rpms/python3.9.git /var/lib/mock/f40-build-2675486-67829/root/chroot_tmpdir/scmroot/python3.9
Cloning into '/var/lib/mock/f40-build-2675486-67829/root/chroot_tmpdir/scmroot/python3.9'...
$ git fetch origin 59b6d298e95925a8accf571bace0e276eedf2806:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python3.9
 * [new ref]         59b6d298e95925a8accf571bace0e276eedf2806 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 59b6d29 Update to 3.9.19