$ git clone -n https://src.fedoraproject.org/rpms/plasma-activities.git /var/lib/mock/f42-build-862324-170742/root/chroot_tmpdir/scmroot/plasma-activities
Cloning into '/var/lib/mock/f42-build-862324-170742/root/chroot_tmpdir/scmroot/plasma-activities'...
$ git fetch origin 8a9441ed6ef0ce26d8f2d1e528294378a4ee1bfa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-activities
 * [new ref]         8a9441ed6ef0ce26d8f2d1e528294378a4ee1bfa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a9441e 6.2.4