$ git clone -n https://src.fedoraproject.org/rpms/deltarpm.git /var/lib/mock/f40-build-2686616-68066/root/chroot_tmpdir/scmroot/deltarpm
Cloning into '/var/lib/mock/f40-build-2686616-68066/root/chroot_tmpdir/scmroot/deltarpm'...
$ git fetch origin 90d975faccdd96b68e8c8344b416ff544d51fdb2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/deltarpm
 * [new ref]         90d975faccdd96b68e8c8344b416ff544d51fdb2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90d975f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild