$ git clone -n https://src.fedoraproject.org/rpms/kf5-kguiaddons.git /var/lib/mock/f40-build-740209-109580/root/chroot_tmpdir/scmroot/kf5-kguiaddons
Cloning into '/var/lib/mock/f40-build-740209-109580/root/chroot_tmpdir/scmroot/kf5-kguiaddons'...
$ git fetch origin f2da64025f5c0385a1382d358bfa1923f7a79c1c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kguiaddons
 * [new ref]         f2da64025f5c0385a1382d358bfa1923f7a79c1c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2da640 Fix kf6-kguiaddons requires to be arch-specific