$ git clone -n https://src.fedoraproject.org/rpms/plasma-systemmonitor.git /var/lib/mock/f40-build-2476655-61589/root/chroot_tmpdir/scmroot/plasma-systemmonitor
Cloning into '/var/lib/mock/f40-build-2476655-61589/root/chroot_tmpdir/scmroot/plasma-systemmonitor'...
$ git fetch origin cab2c7bd52f3bab54b9aa5041ba935278b2c3c1e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-systemmonitor
 * [new ref]         cab2c7bd52f3bab54b9aa5041ba935278b2c3c1e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cab2c7b 6.0.0