$ git clone -n https://src.fedoraproject.org/rpms/plasma-systemmonitor.git /var/lib/mock/f40-build-1509029-23893/root/chroot_tmpdir/scmroot/plasma-systemmonitor
Cloning into '/var/lib/mock/f40-build-1509029-23893/root/chroot_tmpdir/scmroot/plasma-systemmonitor'...
$ git fetch origin 87d27e1c08fb3bc9e99fc6569c14603a5997a0fc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-systemmonitor
 * [new ref]         87d27e1c08fb3bc9e99fc6569c14603a5997a0fc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 87d27e1 6.1.2