$ git clone -n https://src.fedoraproject.org/rpms/plasma-camera.git /var/lib/mock/f43-build-60960713-6586786/root/chroot_tmpdir/scmroot/plasma-camera
Cloning into '/var/lib/mock/f43-build-60960713-6586786/root/chroot_tmpdir/scmroot/plasma-camera'...
$ git fetch origin 403a01fde1e02fff08e5df013b118af2adfa941b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-camera
 * [new ref]         403a01fde1e02fff08e5df013b118af2adfa941b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 403a01f Added excludearch, libcamera doesn't build on ppc and s390x