$ git clone -n https://src.fedoraproject.org/rpms/cairomm1.16.git /var/lib/mock/f40-build-2339063-59635/root/chroot_tmpdir/scmroot/cairomm1.16
Cloning into '/var/lib/mock/f40-build-2339063-59635/root/chroot_tmpdir/scmroot/cairomm1.16'...
$ git fetch origin 902f5f6c7b3bc72ed401b1bc9bb05da69454a736:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cairomm1.16
 * [new ref]         902f5f6c7b3bc72ed401b1bc9bb05da69454a736 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 902f5f6 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild