$ git clone -n https://src.fedoraproject.org/rpms/viewnior.git /var/lib/mock/f40-build-792721-138594/root/chroot_tmpdir/scmroot/viewnior
Cloning into '/var/lib/mock/f40-build-792721-138594/root/chroot_tmpdir/scmroot/viewnior'...
$ git fetch origin 2788c20a1d466bef898d78517e3aba09608a2b22:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/viewnior
 * [new ref]         2788c20a1d466bef898d78517e3aba09608a2b22 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2788c20 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild