$ git clone -n https://src.fedoraproject.org/rpms/kactivitymanagerd.git /var/lib/mock/f41-build-857397-168076/root/chroot_tmpdir/scmroot/kactivitymanagerd
Cloning into '/var/lib/mock/f41-build-857397-168076/root/chroot_tmpdir/scmroot/kactivitymanagerd'...
$ git fetch origin 222c1b1e20f35ad4e057c0fdfa5f6f4f9cf48de2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kactivitymanagerd
 * [new ref]         222c1b1e20f35ad4e057c0fdfa5f6f4f9cf48de2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 222c1b1 6.2.1