$ git clone -n https://src.fedoraproject.org/rpms/rpmdevtools.git /var/lib/mock/f40-build-2321948-58619/root/chroot_tmpdir/scmroot/rpmdevtools
Cloning into '/var/lib/mock/f40-build-2321948-58619/root/chroot_tmpdir/scmroot/rpmdevtools'...
$ git fetch origin dd63de6d120e1e586a80cac8bac788ccd8a5cdb8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpmdevtools
 * [new ref]         dd63de6d120e1e586a80cac8bac788ccd8a5cdb8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd63de6 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild