$ git clone -n https://src.fedoraproject.org/rpms/plasma-nm.git /var/lib/mock/f42-build-862410-170805/root/chroot_tmpdir/scmroot/plasma-nm
Cloning into '/var/lib/mock/f42-build-862410-170805/root/chroot_tmpdir/scmroot/plasma-nm'...
$ git fetch origin 954c19fa4c8f4f5431d45c88782758b0e0d9a5af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-nm
 * [new ref]         954c19fa4c8f4f5431d45c88782758b0e0d9a5af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 954c19f 6.2.4