$ git clone -n https://src.fedoraproject.org/rpms/python-niaclass.git /var/lib/mock/f39-build-1943203-43178/root/chroot_tmpdir/scmroot/python-niaclass
Cloning into '/var/lib/mock/f39-build-1943203-43178/root/chroot_tmpdir/scmroot/python-niaclass'...
$ git fetch origin bf7ab39259aa663797ba6da925aa33015a77d36a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-niaclass
 * [new ref]         bf7ab39259aa663797ba6da925aa33015a77d36a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bf7ab39 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild