$ git clone -n https://src.fedoraproject.org/rpms/tree-pkg.git /var/lib/mock/f40-build-792501-138440/root/chroot_tmpdir/scmroot/tree-pkg
Cloning into '/var/lib/mock/f40-build-792501-138440/root/chroot_tmpdir/scmroot/tree-pkg'...
$ git fetch origin 48d6a8f7ff42d0486a150ab6255ca344ab46aa4f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tree-pkg
 * [new ref]         48d6a8f7ff42d0486a150ab6255ca344ab46aa4f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 48d6a8f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild