$ git clone -n https://src.fedoraproject.org/rpms/plasma-activities.git /var/lib/mock/f45-build-28571-631/root/chroot_tmpdir/scmroot/plasma-activities
Cloning into '/var/lib/mock/f45-build-28571-631/root/chroot_tmpdir/scmroot/plasma-activities'...
$ git fetch origin 5a98a847a9956171cb4a62aac7c7936d0e316f9c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-activities
 * [new ref]         5a98a847a9956171cb4a62aac7c7936d0e316f9c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a98a84 6.7.5