$ git clone -n https://src.fedoraproject.org/rpms/python-dfdatetime.git /var/lib/mock/f39-build-1429588-31685/root/chroot_tmpdir/scmroot/python-dfdatetime
Cloning into '/var/lib/mock/f39-build-1429588-31685/root/chroot_tmpdir/scmroot/python-dfdatetime'...
$ git fetch origin bb6aa3d54cf91a9bfb7d21e62b5fe19c2f7de6da:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-dfdatetime
 * [new ref]         bb6aa3d54cf91a9bfb7d21e62b5fe19c2f7de6da -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb6aa3d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild