$ git clone -n https://src.fedoraproject.org/rpms/kf5-plasma.git /var/lib/mock/f38-build-729636-101821/root/chroot_tmpdir/scmroot/kf5-plasma
Cloning into '/var/lib/mock/f38-build-729636-101821/root/chroot_tmpdir/scmroot/kf5-plasma'...
$ git fetch origin ac14d89bf626552c27048414ff0a842109a8252e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-plasma
 * [new ref]         ac14d89bf626552c27048414ff0a842109a8252e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac14d89 5.107.0